Quick Spiced Red Lentil Soup
This quick spiced red lentil soup is a weeknight staple that comes together in under 40 minutes with almost no hands-on time.
Warm cumin, turmeric, and a hit of lemon turn simple pantry ingredients into a thick, satisfying bowl. It tastes far more complex than the effort suggests.
Why This Red Lentil Soup Stays in Rotation
This is not one of those lentil soups that tastes like health food. It’s rich from a quick bloom of spices in oil, and the lentils themselves give it a velvety body without needing a blender.
I love that it’s ready fast enough for a Tuesday but tastes slow-cooked. The lemon juice stirred in at the end wakes up all the earthy flavors and makes each spoonful bright.
Ingredients
- 2 tbsp olive oil: extra virgin is fine
- 1 medium onion, finely chopped: yellow or white
- 2 garlic cloves, minced
- 1 carrot, diced: adds sweetness and body
- 1 tsp ground cumin
- 1/2 tsp ground turmeric
- 1/4 tsp black pepper: fresh ground
- 1 cup dried red lentils: rinsed
- 4 cups vegetable broth: or chicken broth if not vegetarian
- 1 tsp salt: adjust to taste
- 2 tbsp fresh lemon juice: from about 1 lemon
- Chopped fresh cilantro or parsley: for serving
Variations / Substitutions
- Spice swap: use curry powder instead of cumin and turmeric for a different warm spice blend.
- Make it creamy: stir in 1/4 cup coconut milk at the end for a richer texture.
- Add heat: a pinch of red pepper flakes or a finely chopped jalapeño with the onion.
- Veggie variation: swap carrot for diced sweet potato or butternut squash, adding a little extra broth if needed.
- Broth: chicken broth works just as well if you’re not keeping it vegetarian.
If you like this, you’ll probably also enjoy our Lemony Chickpea Soup.
How To Make Quick Spiced Red Lentil Soup
Step 1: Sauté the Aromatics
Warm the 2 tbsp olive oil in a large pot over medium heat. Add the onion and carrot with a pinch of salt and cook, stirring occasionally, until softened, about 5 minutes.
The onion should turn translucent and the carrot will start to sweeten in the oil. This base is what builds the soup’s flavor from the start, so give it the full time.
Step 2: Bloom the Spices
Stir in the 1 tsp cumin, 1/2 tsp turmeric, 1/4 tsp black pepper, and the minced garlic. Cook for 60 seconds, just until the spices are fragrant and the garlic is golden.
You’ll see the oil take on a deep yellow hue from the turmeric and smell the warm, earthy aroma. Letting the spices toast for that minute releases their oils and deepens the flavor considerably.
Step 3: Simmer the Lentils
Add the 1 cup rinsed red lentils, 4 cups vegetable broth, and 1 tsp salt. Bring to a boil, then reduce the heat to a steady simmer. Cover and cook for 20–25 minutes, stirring once or twice, until the lentils have broken down completely and the soup is thick.
The soup will look brothy at first, then gradually turn creamy and orange as the lentils soften. Taste for salt at the end, but remember your broth already adds some saltiness.
Step 4: Stir in the Lemon and Serve
Remove the pot from the heat and stir in the 2 tbsp fresh lemon juice. Ladle into bowls and top with chopped cilantro or parsley.
The lemon brightens the whole pot and balances the earthy spices. Serve with warm flatbread or crusty bread on the side for a complete meal.
Tips for the Best Red Lentil Soup
- Always rinse the lentils in a fine-mesh strainer to remove any dust or debris.
- Red lentils cook quickly and break down completely, giving you that creamy texture. Don’t swap them for brown or green lentils here.
- Leftover soup thickens considerably; thin it with a splash of water or broth when reheating.
- Don’t skip the lemon. It cuts through the spice and makes the soup come alive.
Storing Leftover Soup
- Refrigerate: keeps for up to 4 days in an airtight container.
- Reheating: warm gently on the stove, adding a splash of water to thin it out.
What To Serve With This Red Lentil Soup
A stack of warm pita or naan is perfect for scooping up the thick soup. For something cool and crunchy, try a simple cucumber and tomato salad dressed with lemon and olive oil. A slice of toasted sourdough rubbed with garlic is also a great choice.
Frequently Asked Questions
Can I make this in an Instant Pot?
Yes. Sauté the aromatics and spices on the Sauté function, then add lentils and broth. Cook on high pressure for 8 minutes, then let the pressure release naturally for 10 minutes before quick releasing the rest.
Can I freeze this soup?
Absolutely. Cool it completely, transfer to freezer-safe containers, and freeze for up to 3 months. Thaw overnight in the fridge and reheat gently, adding a little water or broth to loosen it.
How can I make it creamier without dairy?
Blend about 1 cup of the finished soup and stir it back into the pot, or add 1/4 cup coconut milk right before the lemon juice.
Can I add other vegetables?
Yes. A handful of baby spinach stirred in at the end wilts nicely, or add diced zucchini along with the carrot. Just keep the overall liquid-to-lentil ratio similar so the soup stays thick.
Quick Spiced Red Lentil Soup Recipe
Ingredients
Method
- Heat the olive oil in a large pot over medium heat. Add the onion and carrot with a pinch of salt and cook until softened, about 5 minutes.
- Stir in the cumin, turmeric, black pepper, and garlic and cook for 1 minute until fragrant.
- Add the rinsed lentils, vegetable broth, and salt. Bring to a boil, then reduce the heat and simmer, covered, for 20–25 minutes until the lentils have broken down and the soup is thick.
- Remove from heat and stir in the lemon juice. Ladle into bowls and top with chopped cilantro or parsley.
