Split red lentils soften into the liquid around them, making a thick soup without adding cream. Carrot gives this version sweetness, cumin provides a warm savoury note, and lemon sharpens the finish.
The recipe makes about four modest bowls. Use split red lentils rather than whole brown or green lentils: the intended result is a soft, spoonable soup, not a broth containing separate firm lentils.
Gather the ingredients
- 200 g dried split red lentils
- 1 medium onion, finely chopped
- 2 medium carrots, peeled if desired and finely diced
- 2 garlic cloves, finely chopped
- 2 tablespoons olive oil, plus a little extra for serving if wanted
- 1 teaspoon ground cumin
- 1 litre vegetable stock, plus hot water as needed
- 1 lemon, for juice added to taste
- Salt and black pepper, to taste
- A small handful of chopped parsley, optional
Check that the stock is suitable for a vegan meal if that matters to your table. Stock cubes differ in saltiness, so leave the final seasoning until you have tasted the cooked soup. Review ingredient labels for any dietary requirements.
Prepare the lentils and vegetables
Spread the lentils on a plate and remove any small stones or other foreign material. Put them in a fine sieve and rinse under running water. Lentils do not need an overnight soak before cooking.
Cut the carrot into small, reasonably even pieces so it can soften alongside the lentils. Large chunks may remain firm when the lentils have already broken down. Keep the chopped garlic separate from the onion and carrot because it needs less initial cooking.
Use a saucepan with room for stirring and for the liquid to bubble without spilling. Keep a little extra water available; the exact amount needed will depend on the pan and how much evaporates.
Build the base gently
Warm the olive oil over a medium-low heat. Add the onion and carrot, then cook, stirring periodically, until the onion has softened. Allow roughly six to eight minutes, adjusting the heat if the onion starts catching.
Add the garlic and cumin and stir briefly, about thirty seconds, until fragrant. Avoid leaving the spices against a dry, very hot pan. The aim is an aromatic base without burnt garlic or scorched cumin.
Add the rinsed lentils and the stock. Stir across the base to release any softened onion, then bring the mixture to a gentle boil. Reduce the heat to maintain a simmer.
Cook to texture, not only to the clock
Simmer with the lid partly covering the pan, stirring occasionally and checking the bottom. Split red lentils commonly soften in about fifteen to thirty minutes. Use that range as a guide and continue until both the lentils and carrot are tender.
If the mixture becomes thick while the carrot is still firm, add a little hot water and keep cooking gently. A rapidly boiling, uncovered pan can lose liquid faster than you intend.
When ready, stir firmly to encourage the lentils to break down. You can press any remaining soft carrot pieces with a potato masher for a more even texture. A completely smooth puree is optional; small soft pieces suit the soup too.
Finish the flavour and consistency
Take the pan off the heat. Add a small squeeze of lemon, stir, and taste a spoonful once it is cool enough. Add more lemon gradually, followed by salt and pepper as needed.
The soup should flow from the spoon rather than sit like a stiff mash. Add hot water a little at a time if needed. If it is thinner than you want, return it to a gentle simmer and stir while a little liquid evaporates.
Serve in bowls with parsley and an optional small drizzle of olive oil. Keep extra lemon on the table so each person can adjust their own portion. Bread is an optional accompaniment rather than a required part of the recipe.
Store the extra portions safely
Divide leftovers into shallow containers and refrigerate promptly, within two hours of cooking, or within one hour when the surrounding temperature exceeds 32°C. Keep the refrigerator at 4°C or below and use refrigerated leftovers within three to four days, or freeze them.
The soup may thicken during storage. Add a little water when reheating and stir thoroughly. Reheat leftovers to at least 74°C and bring soup to a rolling boil. Check the consistency again before serving.