Smoky Red Lentil & Carrot Soup with Lemon

A pot of this smoky red lentil and carrot soup turns a few low-cost pantry staples into a cozy, satisfying vegan lunch or dinner. Split red lentils soften into a naturally thick, creamy broth, while carrots add sweetness, smoked paprika brings gentle warmth, and a little lemon keeps the flavors bright. No cream or blender is required.

Recipe at a glance

• Servings: 4 generous bowls (about 1½ cups each)
• Prep time: 10 minutes
• Cook time: About 30 minutes
• Total time: About 40 minutes
• Equipment: Large saucepan or Dutch oven, knife, cutting board, stirring spoon; immersion blender optional

Ingredients

• 1 tablespoon (15 ml) olive oil
• 1 medium yellow onion (about 150 g), finely diced
• 2 medium carrots (about 200 g total), peeled and diced into small ¼-inch (6 mm) pieces
• 3 garlic cloves (about 10 g), minced
• 1 tablespoon (about 16 g) tomato paste
• 1 teaspoon smoked paprika
• 1 teaspoon ground cumin
• ¼ teaspoon crushed red pepper flakes (optional, for gentle heat)
• 1 cup (about 190 g) dried split red lentils, picked over and rinsed
• 4 cups (960 ml) low-sodium vegetable broth
• 1 cup (240 ml) water, plus more if needed to thin the soup
• ½ teaspoon fine salt, or to taste depending on your broth
• ¼ teaspoon ground black pepper
• 1 tablespoon (15 ml) freshly squeezed lemon juice, plus a little more to taste
• 2 tablespoons chopped fresh flat-leaf parsley, for serving
• Optional to serve: 4 lemon wedges and 4 slices vegan crusty bread (about 40 g each)

How to make smoky red lentil and carrot soup

1. Prepare the vegetables and lentils. Dice the onion and carrots into small, even pieces and mince the garlic. Place the dried lentils in a sieve, remove any debris, and rinse well under cool water.
2. Soften the vegetables. Warm the olive oil in a large saucepan over medium heat. Add the onion and carrots and cook for 6–7 minutes, stirring regularly, until the onion is translucent and the carrots are beginning to soften; they do not need to be fully tender yet.
3. Bloom the seasonings. Stir in the garlic, tomato paste, smoked paprika, ground cumin, and the optional red pepper flakes. Cook for about 1 minute, stirring constantly, until fragrant. If the spices begin to catch, add 1 tablespoon of the measured water.
4. Simmer the soup. Add the rinsed lentils, 4 cups vegetable broth, the remaining measured water, salt, and pepper. Stir to loosen any seasoning from the bottom of the pan. Bring to a gentle boil, then reduce the heat to maintain a steady simmer. Cook partly covered for 20–22 minutes, stirring a few times, until the lentils are very soft and the carrot pieces are fork-tender.
5. Adjust the texture. The lentils should naturally break down and thicken the soup. For a smoother texture, take the pot off the heat and carefully use an immersion blender for a few short pulses, leaving some texture. Add a splash of water if the soup is thicker than you like, then warm it through again if needed.
6. Finish with lemon. Remove from the heat, stir in 1 tablespoon lemon juice, and taste. Add a little more lemon juice or salt if needed. The soup should taste lightly smoky, savory, and bright rather than sharply sour.
7. Serve. Ladle into four bowls, sprinkle each with the chopped parsley, and offer optional lemon wedges and vegan crusty bread alongside.

Helpful cooking tips

• Choose split red lentils. They cook quickly and become soft and creamy. Whole brown or green lentils hold their shape and need different cooking times, so are not a direct swap here.
• Keep the simmer gentle. Stir periodically and add 2–4 tablespoons hot water at a time if the soup starts to stick or thickens before the carrots are tender.
• Start with less salt. Broths vary widely in sodium. Season at the end after the lentils have absorbed the liquid.
• Skip the blender for a rustic bowl. Split red lentils create body on their own, so an extra appliance is optional.

Budget-friendly substitutions

Use 1 teaspoon regular sweet paprika in place of smoked paprika if that is what you have; the flavor will be less smoky but still delicious. Replace the two carrots with about 1 cup (200 g) peeled, finely diced sweet potato, and simmer until fully tender. If you have no parsley, use 2 tablespoons chopped cilantro or omit the garnish. For a tangy finish without lemon, start with 2 teaspoons (10 ml) apple cider vinegar, taste, and add more only if needed. Use water with a little extra salt in place of some vegetable broth if necessary, but broth gives the soup more flavor.

Storage and meal prep

Let leftovers cool promptly and refrigerate in shallow, covered containers within 2 hours. Store in the refrigerator for up to 4 days, or freeze in freezer-safe portions for up to 3 months for best quality. The soup thickens as it stands; loosen with a little water or broth when reheating, and heat until steaming hot throughout. Add fresh parsley and lemon after reheating for the brightest flavor. If serving with bread, store it separately so it stays crisp.

Featured photograph shows an illustrative serving of orange lentil soup with parsley and bread; the precise texture and garnish of your finished soup may vary.