Caramelized Onion Red Lentil Soup Recipe

Introduction

This Caramelized Onion Red Lentil Soup is a comforting and flavorful dish perfect for any season. Slow-cooked caramelized onions add a rich sweetness that complements the earthy lentils and warm spices. It’s hearty, nutritious, and easy to make in under an hour.

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: Once the onions are caramelized, add the minced garlic, ground cumin, and smoked paprika. Stir for about 1-2 minutes until fragrant.
3. Step 3: Add the diced carrots and cook for another 5 minutes until they begin to soften.
4. Step 4: Add the rinsed red lentils, vegetable broth, and diced tomatoes to the pot. Stir well and bring to a boil.
5. Step 5: Once boiling, reduce the heat to low, cover the pot, and let it simmer for about 20 minutes, or until the lentils are tender.
6. Step 6: If you prefer 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 seasoning if necessary.
8. Step 8: Serve the soup hot, garnished with fresh parsley or cilantro if desired.

Tips & Variations

• For added depth, use a mix of vegetable broth and water or substitute water with chicken broth if not vegetarian.
• If you like a bit of heat, add a pinch of cayenne pepper or chili flakes when adding the spices.
• To make it heartier, stir in some cooked rice or quinoa just before serving.
• Caramelize the onions slowly to develop maximum sweetness and flavor; patience really pays off here.

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 splash of water or broth if it becomes too thick. 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 other types of lentils in this soup?

Red lentils work best because they cook quickly and soften into a creamy texture. Green or brown lentils hold their shape more, so you’ll get a chunkier soup and longer cooking time.

Do I have to peel the onions before caramelizing?

Yes, peeling the onions is important to remove the outer skin, which can be tough and unpleasant to eat.

Caramelized Onion Red Lentil Soup Recipe

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4.4 from 74 reviews

A hearty and flavorful Caramelized Onion Red Lentil Soup that combines sweet caramelized onions with warm spices, tender red lentils, and fresh vegetables. This nutritious and comforting soup is perfect for a cozy meal, offering a delightful balance of textures and aromatic flavors, finished with a splash of lemon juice and fresh herb garnish.

• Author: Stella
• Prep Time: 10 minutes
• Cook Time: 35 minutes
• Total Time: 45 minutes
• Yield: 4 servings 1x
• Category: Soup
• Method: Stovetop
• Cuisine: Mediterranean
• Diet: Vegetarian

Ingredients

Scale 1x2x3x

Soup Base

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

Spices

• 2 teaspoons ground cumin
• 1 teaspoon smoked paprika

Main Ingredients

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

Seasoning and Garnish

• 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. Caramelize 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 caramelized and golden brown, which develops their natural sweetness and rich flavor.
2. Add Garlic and Spices: Stir in the minced garlic, ground cumin, and smoked paprika. Cook for 1-2 minutes, stirring frequently, until the spices are fragrant, which infuses the soup base with warm, smoky flavor notes.
3. Cook Carrots: Add the diced carrots to the pot and cook for an additional 5 minutes, allowing them to soften and blend their mild sweetness into the base.
4. Add Lentils, Broth, and Tomatoes: Pour in the rinsed red lentils, vegetable broth, and canned diced tomatoes. Stir well to combine all ingredients evenly. Bring the mixture to a boil over medium-high heat.
5. Simmer Soup: Reduce the heat to low, cover the pot, and let the soup simmer gently for about 20 minutes until the lentils are tender and cooked through, creating a hearty texture.
6. Blend Soup (Optional): If you prefer a smoother consistency, use an immersion blender to puree the soup directly in the pot until reaching your desired texture. Otherwise, leave it chunky for a rustic feel.
7. Season and Brighten: Stir in the salt, black pepper, and lemon juice. Taste and adjust seasoning as needed to balance the flavors with acidity and seasoning.
8. Serve and Garnish: Ladle the hot soup into bowls and garnish with fresh parsley or cilantro if desired, adding freshness and color to the final presentation.

Notes

• To deepen the caramelization, be patient and stir onions occasionally to prevent burning.
• The soup can be stored in an airtight container in the refrigerator for up to 4 days or frozen for up to 3 months.
• For extra protein, add cooked chicken or dollops of Greek yogurt on serving.
• Adjust the seasoning and spices according to your taste preference.
• Use vegetable broth for a vegetarian or vegan version.

Keywords: caramelized onion soup, red lentil soup, vegetarian soup, healthy lentil soup, Mediterranean soup, comfort food, easy lentil recipe