Red lentils soften quickly and blend into a creamy soup without cream. Carrots bring a gentle sweetness, while cumin and fresh ginger keep the flavour from becoming flat. The ingredient list is short, but the order matters: give the onion time to soften before adding stock, and leave the lemon until the end.

The finished soup should pour from a ladle, not sit in a mound. Lentils continue to absorb liquid after cooking, so keep extra water nearby when adjusting the texture or reheating the next day. A stick blender is convenient, but the soup also works with a more rustic, partially mashed finish.

The recipe

Carrot and red lentil soup

4 generous servings · 45 minutes total · Metric measurements

Ingredients

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Method

  1. Start the baseWarm the oil in a large saucepan over medium heat. Add the onion and a pinch of salt. Cook for 7-8 minutes until softened, stirring often.
  2. Add the aromaticsAdd the carrots, garlic, ginger and cumin. Stir for 1 minute, coating the carrots in the oil and spices.
  3. SimmerAdd the lentils, stock and 250 ml water. Bring to a boil, then lower to a gentle simmer. Partially cover and cook for 20-25 minutes, stirring occasionally, until the carrots are tender and the lentils are falling apart.
  4. Blend carefullyTake the pan off the heat. Use a stick blender with the blade fully submerged to blend until smooth. If using a jug blender, follow its hot-liquid instructions, work in small batches and never seal hot soup in a blender not designed for it.
  5. Adjust the finishStir in 1 tablespoon lemon juice and black pepper. Add hot water until the soup pours easily. Taste, then adjust the salt and lemon. Warm gently if necessary.

Small details that help

  • Cut the carrots evenly. Large pieces may stay firm after the lentils have softened.
  • Rinse the lentils in a fine sieve until the water looks clearer, and remove any small stones or damaged pieces.
  • Blend after taking the pan off the heat to reduce splashing. Keep children away from the blending area.

Swaps and variations

For a rounder flavour, replace 200 ml of the water with coconut milk. For a chunkier soup, blend only half and stir it back into the pot. Green or brown lentils are not direct substitutes because they hold their shape and need longer cooking.

What to serve with it

Serve with toasted bread and a little olive oil. A spoonful of plain yogurt or chopped coriander is optional. Add toppings just before serving so the soup stays easy to store.

Storage and reheating

Refrigerate promptly in shallow covered containers and use within 3 days. Reheat, stirring often, to 74°C / 165°F. Add water as it thickens. Freeze for up to 2 months for best quality and thaw in the refrigerator.

Food-safety reference: safe cooking and reheating temperatures. Refrigerate perishable food within 2 hours, or 1 hour above 32°C / 90°F. Keep the refrigerator at 4°C / 40°F or below.

Common questions

Do I need to soak red lentils?

No soaking is needed for the split red lentils used here. Rinse and inspect them before cooking.

Why is my soup so thick?

Lentils absorb liquid during cooking and storage. Stir in water or stock gradually until you like the consistency.

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