Lentil Soup

Lentil soup is a one-pot meal of tender lentils, aromatics, and broth that comes together in under an hour. The soup is hearty but light, with a flavor that builds as it simmers. The key is browning the onion and garlic first, which gives the whole pot depth.

Ingredients for Lentil Soup

Lentils are the base and stay intact as they cook. Onion and garlic build a savory foundation when browned in oil before the broth goes in. Carrots and celery add sweetness and body. Chicken broth or vegetable broth carries all the flavors. Tomato paste deepens the taste and adds acidity. Cumin and paprika warm the soup with spice. Bay leaf perfumes it gently. Olive oil carries the aromatics and seasons the pot. Salt and black pepper balance everything at the end.

Why This Lentil Soup Works

Browning the onion and garlic in oil before adding any liquid is the move that makes this soup taste full. The onion softens and sweetens, and the garlic loses its raw bite. This takes just a few minutes and sets up all the flavor that follows.

The lentils cook in the broth without breaking down, staying whole and tender. Cumin and paprika bloom in the hot oil at the start, so their flavors spread through the whole pot instead of tasting flat. The tomato paste adds brightness and body without making it taste tomato-forward.

The soup tastes better the next day after the flavors settle. It also freezes well for up to three months if you let it cool completely first. Salt and pepper are added at the end so you can taste and adjust.

Mistakes To Avoid

Skipping the browning step leaves the soup tasting one-note and thin. The onion should soften and caramelize slightly, and the garlic should release its aroma. If you add broth right away, the soup tastes like hot lentil water instead of a built dish.

Not stirring the tomato paste and spices into the oil means they sit raw in the broth and taste bitter or harsh. Toast them for about a minute so they mellow and their flavors spread evenly. This is the same reason you bloom spices in oil or butter for any dish.

Oversalting early makes it hard to taste your way to the right amount at the end. Add a small pinch at the start to help the vegetables soften, then taste and adjust in the last few minutes. You can always add more, but you cannot take it out.

Overcooking the lentils turns them to mush and makes the soup gritty instead of hearty. Check them at 30 minutes and cook just until tender enough to break with a spoon. Red lentils fall apart quickly, so brown or green lentils are the right choice here.

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Ingredients

• 2 tablespoons olive oil
• 1 medium onion, diced
• 3 cloves garlic, minced
• 2 medium carrots, diced
• 2 celery stalks, diced
• 1 1/2 cups brown or green lentils, rinsed
• 2 tablespoons tomato paste
• 1 teaspoon ground cumin
• 1/2 teaspoon paprika
• 1 bay leaf
• 6 cups chicken broth or vegetable broth
• Salt and black pepper to taste

Step-by-step Instructions

1. Heat olive oil in a large pot over medium heat until shimmering, about 1 minute.
2. Add diced onion and cook, stirring occasionally, until softened and golden, 5 to 7 minutes.
3. Stir in garlic and cook for 1 minute until fragrant.
4. Add tomato paste, cumin, and paprika, stirring constantly for 1 minute until the spices release their aroma.
5. Pour in broth, then add rinsed lentils, carrots, celery, and bay leaf. Bring to a simmer over medium-high heat.
6. Reduce heat to medium-low and simmer uncovered for 30 to 40 minutes until lentils are tender but hold their shape when stirred.
7. Remove the bay leaf. Taste and add salt and pepper until the flavors are balanced and taste bright.
8. If the soup is too thick, add broth or water 1/4 cup at a time. If it is too thin, simmer uncovered for 5 more minutes.