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1
Make the Nam Jim Dipping Sauce
10 Mins
Room temperature, about 20°C (68°F)
Put the garlic, chillies and coriander in a small bowl and pound or chop them together until rough and fragrant. Stir in the lime juice, fish sauce and palm sugar and keep stirring until the sugar has fully dissolved. Taste it: it should hit sour, salty, hot and faintly sweet in that order. Set aside.
Make the sauce first and let it sit — ten minutes of resting lets the garlic and chilli mellow into the lime and fish sauce.
Done when: A cloudy, fiery sauce that smells of lime and garlic and tastes hot, sour and salty.
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2
Heat the Grill and Oil the Prawns
5 Mins
High heat, about 230°C (450°F)
Rinse the prawns under cold water and pat them completely dry with paper towels. Brush lightly with oil and sprinkle with the salt. Heat the grill — charcoal, gas or a grill pan — until very hot, about 230°C (450°F), and oil the grate.
A grill that is not hot enough is the most common mistake — the prawns steam, the shells stay pale, and the smoke flavour never arrives.
Done when: Dry, lightly oiled prawns and a grill hot enough that a drop of water sizzles away instantly.
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3
Grill the Prawns Until Just Opaque
6 Mins
High heat, about 230°C (450°F); prawns to 63°C (145°F)
Lay the prawns on the grill in a single layer and cook for 2–3 minutes on the first side, without moving them, until the shells turn orange-red and char in places. Turn once and cook 2–3 minutes more until the flesh is opaque all the way through. Prawns must reach 63°C (145°F) inside.
Do not press the prawns down and do not keep turning them — one turn is enough, and every extra turn squeezes out juice.
Done when: Shells orange-red with charred spots, meat opaque white-pink and firm, reading 63°C (145°F).
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4
Plate with Lettuce, Cucumber and Sauce
2 Mins
Hot, about 70°C (158°F)
Move the prawns to a platter lined with lettuce leaves and arrange the cucumber slices alongside. Pour the nam jim into a small bowl and set it in the middle of the platter. Serve immediately, while the prawns are still hot from the grill.
Serve within minutes of grilling — prawns cool fast, and cold prawns lose the smoky edge that makes the dish.
Done when: A steaming platter of orange-red prawns with the sauce bowl in the middle, ready to eat.
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5
Peel, Dip and Eat Hot
2 Mins
Hot, about 70°C (158°F)
Eat with your hands: peel the prawn, dip it lightly in the nam jim and eat it in one or two bites. The sauce is strong, so start with a light dip and add more as you go — and keep a bowl for the shells on the table.
The heads hold the richest flavour — suck the head if you like it the Thai street way, or leave it if you prefer.
Done when: Prawns peeled and dipped, eaten hot, with the sauce doing the talking.
auto_awesome Finishing Touches & Plating
Pile the prawns on a platter with the lettuce and cucumber, put the nam jim in a small bowl in the middle, and eat while the prawns are still hot — peel, dip, eat, repeat. The sauce is meant to be punchy, so dip lightly at first.