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Overview

Ceviche de Concha

Ceviche de Concha Prieta, Ecuadorian Black Clam Ceviche, Ceviche de Conchas Negras

This ceviche de concha recipe cures fresh black clams — concha prieta — in lime juice with tomato, red onion, chilli and cilantro, until the clams' own dark juice turns the whole bowl deep brown-black. It is the Ecuadorian way with conchas negras: tomato and sliced onion instead of the Peruvian aji limo, served ice-cold with crisp fried plantain chifles. One serving is about 429 g.

Concha prieta — the black clam — lives in the mangrove forests of Ecuador's Pacific coast, in the provinces of El Oro and Guayas, where collectors gather it by hand from the mud at low tide. Its dark flesh and darker juice are what set this ceviche apart: the juice turns the whole bowl deep brown-black. The Ecuadorian version is its own dish — unlike the Peruvian ceviche de conchas negras, which uses aji limo peppers and diced onion, the Ecuadorian style builds on tomato and sliced onion, and is served with fried green plantains. The clams are prized enough that harvests are watched closely to keep the mangrove beds healthy.

Pairs well with: Serve ice-cold with crisp chifles and a cold beer or lemonade

Provenance

Ecuador flag Ecuador

Ecuadorian Coastal Classic

Latin America & Caribbean

Time Dedication

45m

30m prep • 15m cook

Batch Yield

4 Servings

345 kcal per serving

1 serving ≈ 429 g

Technical Skill

Intermediate

Moderate (Raw Ceviche)

Meal Timing & Digestive Fit

Breakfast

Not Advised

Lunch

Prime Metabolic Fit

Dinner

Ideal Hearty Main

Snack & Tea

Inappropriate

Occasions: Coastal lunch, seafood feasts, hot days, family gatherings Cost: Medium — about $4–5 per serving at home
Dark ceviche de concha prieta served in a large white clam shell with diced tomato and onion, garnished with fresh herbs, with golden fried plantain chips on a clay plate

Ecuadorian Coastal Classic

Photo: Kevinmero, CC BY-SA 4.0, via Wikimedia Commons

The Heritage Formulary

Measured Ingredients

Estimated cost: Medium — about $4–5 per serving at home (USD)

A good ceviche de concha is dark from the clam juice, sharply sour from the lime, and served ice-cold — never warm, never over-marinated.

Execution Methodology & Culinary Technique

Step-by-Step Cooking Guide

Active 45m
P

Shuck the Clams and Soften the Onion

30 Mins

Scrub the live clams under cold running water and shuck them with a strong knife, keeping every drop of the dark juice that runs out — that juice is what makes the ceviche black. Chop the meat into bite-size pieces. Meanwhile slice the onion into thin half-moons and soak it in cold salted water for 10 minutes to take the raw bite out, then drain it well.

Maestro Tip: Only use live clams with tightly closed shells from a fishmonger you trust, and keep them cold until the minute you shuck them — raw shellfish is only as good as its freshness.

  1. 1

    Clean and Shuck the Clams

    15 Mins Cold, about 4°C (40°F)

    Scrub the 24 clams under cold running water, discarding any with open shells that do not close when tapped. Shuck each one with a strong knife, catching the dark juice in a bowl, and chop the meat into bite-size pieces. Put the meat and its juice in a large glass or ceramic bowl and keep it cold.

    Lime juice does not cook shellfish the way heat does, so freshness is everything — buy the clams the same day, keep them on ice, and never use a clam that smells sour or off.

    Done when: Clean, cold clam meat in its dark juice, smelling fresh of the sea.

  2. 2

    Soften the Onion

    10 Mins Room temperature

    Put the sliced red onion in a bowl of cold water with a pinch of salt and leave it for 10 minutes, then drain it well and pat it dry. This takes the harsh raw bite out and leaves the onion mild, crisp and lightly pink.

    Do not skip the soak — raw red onion straight into lime juice stays harsh and will overpower the clams.

    Done when: Mild, crisp onion half-moons, lightly pink.

  3. 3

    Cure in Lime Juice

    30 Mins Chilled, 4°C (40°F)

    Pour the lime juice, orange juice and blended tomato over the clam meat with the crushed garlic, the chopped chilli, the olive oil and the salt. Stir in the softened onion, the diced tomatoes and half the cilantro, cover, and chill for 30 minutes. The lime firms the clam meat and the dark juice colours the whole bowl.

    Thirty minutes is enough — much longer and the clam meat turns tough and rubbery instead of tender.

    Done when: Dark, glossy ceviche with the clam meat firmed and the onion softened.

  4. 4

    Fry the Chifles

    10 Mins Hot oil, about 175°C (350°F)

    While the ceviche cures, heat the vegetable oil in a frying pan over medium-high heat. Fry the thin plantain rounds in batches for about 2 minutes a side, until golden and crisp, then lift them out, drain on paper and sprinkle with a little salt.

    Fry in small batches so the oil stays hot — crowded rounds steam instead of crisping.

    Done when: Golden, crisp plantain chips, salted while hot.

  5. 5

    Assemble and Serve

    5 Mins Serve cold, 4°C (40°F)

    Taste the ceviche and add a pinch more salt only if it needs it — the clams are naturally salty. Spoon it into cold bowls or back into a clean clam shell, scatter the rest of the cilantro over the top, and serve at once with the warm chifles on the side.

    Serve it ice-cold: warm ceviche tastes flat and the texture goes soft.

    Done when: Ice-cold dark ceviche with cilantro, beside golden chifles.

Finishing Touches & Plating

Spoon the ice-cold ceviche into cold bowls, scatter the cilantro over the top, and serve at once with the crisp, warm chifles for scooping.

Nutritional Physiology & Benefits

Nutrition

Energy

345

kcal / serving

Protein

21g

Complete AA

Carbs

46g

Complex

Fats

9g

Healthy

Per serving (4 servings · 1 serving ≈ 429 g)
Energy345 kcal
Protein21 g
Carbohydrates46 g
Fat9 g
Fibre4.0 g
Sugar8.6 g
Sodium1055 mg
Per 100g
Energy80 kcal
Protein5 g
Carbohydrates10.8 g
Fat2.1 g
Fibre0.9 g
Sugar2 g
Sodium246 mg

Nutrition values are estimated — calculated from USDA FoodData Central values for the listed ingredients.

Vitamins & minerals: Vitamin B12 and iron (black clams), vitamin C (lime, tomato and chilli), potassium (tomato and plantain) and vitamin A (tomato).

Lean, High-Protein Lunch

Each 429 g serving gives about 21.3 g of protein for 345 kcal — the clams do the heavy lifting, with no frying except the chifles.

Fresh, Barely Cooked

Nothing is boiled or fried except the plantain chips — the clams, tomato, onion and lime go in raw, so the dish tastes of the sea.

Iron and B12 from the Sea

Black clams are naturally rich in iron and vitamin B12, and the lime and tomato add vitamin C in the same bowl.

Food Pairings

What to Eat With

To optimize nutrient absorption and elevate the sensory depth, pair with these authentic accompaniments:

Sides

White Rice

Plain white rice is the classic plate-mate on the Ecuadorian coast — it soaks up the dark, sour juices and turns the ceviche into a full lunch.

Patacones

Thick, twice-fried green plantain rounds are sturdier than chifles for scooping, and their salty crunch is the perfect foil for the soft, sour clams.

Drinks

Ice-Cold Beer or Lemonade

Something cold and sharp suits a cold, sour ceviche — a light lager or a glass of lemonade cuts through the briny richness.

Full Menus

Coastal Lunch

Serve the ceviche as the main course of a coastal lunch, with white rice and patacones on the side and lemonade to drink, then fresh fruit to finish.

Complete menu

Serve the ceviche ice-cold with crisp chifles and white rice, with an ice-cold beer or lemonade, for a full coastal lunch.

Digestive Guardrails

What NOT to Combine

To prevent digestive distress, sluggishness, or palate clash, avoid pairing the dish with these elements:

Raw Shellfish from an Unknown Source

Raw clams can carry bacteria that lime juice does not kill, so buy only live clams from a fishmonger you trust, keep them cold, and eat the ceviche the same day. People who are pregnant, elderly, or have a weak immune system should avoid raw shellfish altogether. This is general information, not medical advice.

Over-Marinating the Clams

More than about 40 minutes in lime juice makes the clam meat tough and rubbery instead of tender — 30 minutes is the sweet spot. This is general information, not medical advice.

Salting Before Tasting

Black clams are naturally very salty — about 1,055 mg of sodium per serving already — so taste the finished ceviche before adding any more salt. This is general information, not medical advice.

General information only, not medical advice — consult a doctor for personal dietary decisions.

Who Should Eat It

Who Should Eat

  • General adultsA light but protein-rich lunch — one 429 g serving gives about 21.3 g of protein for 345 kcal.
  • ChildrenRaw shellfish is not suitable for young children — serve them the chifles and a cooked seafood dish instead.
  • ElderlyRaw shellfish carries a higher food-safety risk for older adults, so it is best avoided; ask your clinician if you are unsure.
  • Pregnant womenRaw shellfish should be avoided in pregnancy — the clams are cured in lime juice, not cooked with heat. Ask your clinician if you are unsure.
  • Breastfeeding womenRaw shellfish is best avoided while breastfeeding; ask your clinician if you are unsure.
  • AthletesA lean, high-protein lunch after training — about 21.3 g of protein and 345 kcal a serving.
  • Weight gainAt about 345 kcal a serving, pair it with rice and extra chifles to add energy to the meal.
  • Weight lossFilling and high in protein for 345 kcal, but the chifles add up — one serving with a salad on the side is the lighter choice.

Health Conditions — Adjust or Avoid

Conditions

  • DiabetesAbout 46.2 g of carbohydrate a serving, mostly from the plantain chifles, so a smaller portion of chifles with more ceviche is the safer choice; ask your clinician about a suitable serving.
  • High blood pressureSodium is about 1,055 mg a serving — the clams are naturally salty — so keep to one serving and skip extra salt; ask your clinician if you are unsure.
  • Kidney diseaseThe dish is rich in potassium and has about 21.3 g of protein a serving, and the sodium is high; ask your clinician whether it fits your diet.
  • GoutShellfish is high in purines, so a small portion is wiser than a large one; ask your clinician if you are unsure.
  • Stomach issuesRaw shellfish and sharp lime juice can upset a sensitive stomach — eat it cold, in a modest portion, and ask your clinician if symptoms persist.
  • Cardiovascular diseaseLow in fat at about 9.1 g a serving, but the sodium is high, so keep the portion to one serving; ask your clinician if you are unsure.
  • Fatty liverLean and low in fat, so a modest portion with fewer chifles is a reasonable choice; ask your clinician if you are unsure.
  • Food allergiesContains shellfish (black clams), a recognised allergen — anyone with a shellfish allergy must not eat it. No gluten, egg, milk, peanut or tree nut.
  • Special therapeutic dietsA raw-seafood dish, not a therapeutic food; anyone on a special diet should ask their clinician before eating it.

If you have a medical condition, consult your doctor before changing your diet.

Storage & Use

Storage & Use

How to store
Eat the same day — do not keep raw ceviche overnight if you can avoid it.
In the fridge
Up to 1 day in a covered container, kept very cold; the texture softens and the flavour fades, so same-day is best.
In the freezer
Not recommended — freezing ruins the texture of raw cured shellfish.
How to reheat
Do not reheat — this is a cold dish, served chilled.
Freezing recommended
No — the clams turn rubbery when frozen and thawed.
Signs it has spoiled
A sour or ammonia smell, slimy clam meat, or any off taste — throw it out.

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