Caramelized Onion Red Lentil Soup Recipe

Introduction

This Caramelized Onion Red Lentil Soup is a comforting and hearty dish full of rich, deep flavors. The slow-cooked onions add a sweet, savory base while spices and tomatoes bring warmth and brightness. It’s perfect for a cozy meal any day of the week.

Ingredients

• 2 tablespoons olive oil
• 3 large onions, thinly sliced
• 3 cloves garlic, minced
• 2 teaspoons ground cumin
• 1 teaspoon smoked paprika
• 1.5 cups red lentils, rinsed and drained
• 6 cups vegetable broth or water
• 1 can (14.5 ounces) diced tomatoes
• 2 carrots, diced
• 1 teaspoon salt (adjust to taste)
• ½ teaspoon black pepper (adjust to taste)
• 1 tablespoon lemon juice
• Fresh parsley or cilantro for garnish (optional)

Instructions

1. Step 1: Heat the olive oil in a large pot or Dutch oven over medium heat. Add the sliced onions and a pinch of salt. Cook, stirring occasionally, for about 15-20 minutes until the onions are caramelized and golden brown.
2. Step 2: Add the minced garlic, ground cumin, and smoked paprika to the pot with the onions. Stir for 1-2 minutes until the spices are fragrant.
3. Step 3: Add the diced carrots and cook for another 5 minutes until they begin to soften.
4. Step 4: Stir in the rinsed red lentils, vegetable broth or water, and diced tomatoes. Bring the mixture to a boil.
5. Step 5: Reduce the heat to low, cover the pot, and let the soup simmer for about 20 minutes, or until the lentils are tender.
6. Step 6: For a smoother texture, use an immersion blender to blend the soup to your desired consistency. Otherwise, leave it chunky.
7. Step 7: Stir in the salt, black pepper, and lemon juice. Taste and adjust the seasoning as needed.
8. Step 8: Serve the soup hot, garnished with fresh parsley or cilantro if you like.

Tips & Variations

• For extra depth, try adding a splash of soy sauce or tamari before serving.
• Swap carrot for sweet potato or squash for a different sweetness and texture.
• Use chicken broth instead of vegetable broth if you prefer a non-vegetarian option.
• Add a pinch of chili flakes or a diced chili for a spicy kick.
• Leftover soup can be thickened with a little water or broth when reheating if it becomes too dense.

Storage

Store leftover soup in an airtight container in the refrigerator for up to 4 days. Reheat gently on the stove or in the microwave, adding a little broth or water if it has thickened during storage. This soup also freezes well for up to 3 months—thaw overnight in the fridge before reheating.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use yellow or green lentils instead of red lentils?

Red lentils cook faster and break down more easily, making the soup creamy. Yellow lentils are similar but may take a bit longer to cook. Green lentils hold their shape more and might change the texture. Adjust cooking time accordingly.

Do I need to soak the lentils before cooking?

Red lentils do not require soaking and will cook quickly. Just rinse them well before adding to the soup to remove any debris or dust.

Caramelized Onion Red Lentil Soup Recipe

Print Recipe

★★★★★

4.9 from 127 reviews

This Caramelized Onion Red Lentil Soup is a flavorful, hearty, and comforting dish that combines the sweetness of slowly caramelized onions with earthy red lentils, aromatic spices, and fresh tomatoes. Perfect for a nutritious lunch or dinner, it offers a beautiful balance of savory, smoky, and tangy flavors with a smooth or chunky texture, depending on your preference.

• Author: Tim
• Prep Time: 15 minutes
• Cook Time: 45 minutes
• Total Time: 60 minutes
• Yield: 6 servings 1x
• Category: Soup
• Method: Stovetop
• Cuisine: Middle Eastern
• Diet: Vegan

Ingredients

Scale 1x2x3x

Base Ingredients

• 2 tablespoons olive oil
• 3 large onions, thinly sliced
• 3 cloves garlic, minced

Spices

• 2 teaspoons ground cumin
• 1 teaspoon smoked paprika
• 1 teaspoon salt (adjust to taste)
• ½ teaspoon black pepper (adjust to taste)

Main Components

• 1.5 cups red lentils, rinsed and drained
• 6 cups vegetable broth or water
• 1 can (14.5 ounces) diced tomatoes
• 2 carrots, diced

Finishing Touches

• 1 tablespoon lemon juice
• Fresh parsley or cilantro for garnish (optional)

Instructions

1. Caramelize the Onions: Heat the olive oil in a large pot or Dutch oven over medium heat. Add the sliced onions and a pinch of salt. Cook, stirring occasionally, for about 15-20 minutes until the onions are deeply golden and caramelized, releasing their natural sweetness.
2. Add Aromatics and Spices: Once the onions are caramelized, add the minced garlic, ground cumin, and smoked paprika. Stir continuously for 1-2 minutes until the spices become fragrant and meld with the onions.
3. Cook the Carrots: Add the diced carrots to the pot and cook for another 5 minutes, allowing them to soften slightly and absorb the flavors.
4. Add Lentils, Broth, and Tomatoes: Pour in the rinsed red lentils, vegetable broth, and diced tomatoes. Stir well to combine all ingredients and bring the mixture to a rolling boil over medium-high heat.
5. Simmer the Soup: Once boiling, reduce the heat to low, cover the pot with a lid, and let the soup simmer gently for about 20 minutes, or until the lentils become tender and the flavors have melded beautifully.
6. Blend if Desired: If you prefer a smoother soup, use an immersion blender to puree the soup to your desired consistency. You can also leave it chunky if you enjoy a heartier texture.
7. Season and Add Lemon Juice: Stir in the salt, black pepper, and lemon juice. Taste and adjust the seasoning as needed to balance the flavors perfectly.
8. Serve and Garnish: Ladle the hot soup into bowls and garnish with fresh parsley or cilantro if desired. Serve immediately for a comforting, nutritious meal.

Notes

• Ensure onions are cooked slowly over medium heat to develop a deep caramelized flavor without burning.
• Adjust the thickness by adding more broth or water if the soup becomes too thick.
• For a richer flavor, substitute vegetable broth with homemade broth if available.
• This soup can be stored in the refrigerator for up to 4 days or frozen for up to 3 months.
• Add a pinch of chili flakes if you like a little heat.
• Can be made vegan and gluten-free as written.

Keywords: caramelized onion soup, red lentil soup, vegan lentil soup, healthy soup recipe, Middle Eastern soup, easy stovetop soup