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1
Soften the Vegetables
8 Mins
Medium heat, ~160°C (320°F)
Heat the olive oil in a large pot. Add the onion, carrot and potato and cook for 5 minutes, stirring now and then, until the onion turns soft and pale. Stir in the garlic, tomato paste and cumin and cook for 1 more minute until the paste darkens a shade and smells sweet.
Frying the tomato paste first takes away its raw, tinny edge and gives the soup its golden colour.
Done when: The onion is soft and the tomato paste has turned a deep brick red.
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2
Add the Lentils and Stock
2 Mins
High heat to bring to a boil, ~100°C (212°F)
Pour in the vegetable stock, add the rinsed red lentils and the salt, and stir well, scraping the bottom of the pot so nothing sticks. Bring the pot to a rolling boil, then skim off any foam that rises to the surface.
Skimming the foam keeps the finished soup clear and silky instead of cloudy.
Done when: The soup is boiling and the foam has been skimmed away.
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3
Simmer Until Soft
20 Mins
Gentle simmer, ~95°C (203°F)
Turn the heat down to a gentle simmer, half-cover the pot with a lid and cook for 20 minutes, stirring once or twice. The lentils should fall apart completely and the potato and carrot should be soft enough to crush with a spoon.
Keep the simmer gentle — hard boiling throws the lentils against the pot and makes the soup grainy.
Done when: The lentils have dissolved and the vegetables crush easily against the side of the pot.
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4
Blend Until Silky
5 Mins
Off the heat (soup ~90°C / 194°F)
Take the pot off the heat and let it cool for 2 minutes. Blend the soup with a stick blender, moving it slowly through the pot, until it is completely smooth and pours like thick cream. Taste and add more salt or a little water if it is thicker than you like.
Blend in short bursts and keep the blender head under the surface, or the hot soup will splash.
Done when: The soup is velvety smooth with no lumps, and coats the back of a spoon.
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5
Paprika Butter and Lemon
5 Mins
Low heat, ~120°C (250°F)
Melt the butter in a small pan over low heat. Take it off the heat, stir in the paprika and red pepper flakes, and let it sit for 1 minute — the butter will turn a deep red. Ladle the soup into bowls, swirl a spoonful of the paprika butter over each one, and serve with lemon wedges and a pinch of dried mint.
Take the butter off the heat before adding the paprika, or the spice will burn and turn bitter.
Done when: Each bowl is golden, glossy, and streaked with red paprika butter.
auto_awesome Finishing Touches & Plating
Ladle the soup into warm bowls and swirl a spoonful of paprika butter over each one. Serve at once with lemon wedges on the side, so everyone can squeeze in as much brightness as they like.