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Slow Cooker Lentil Soup Recipe

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4.3 from 4 reviews

A hearty and nutritious Slow Cooker Lentil Soup made with brown lentils, fresh vegetables, and warming spices. Perfect for an easy, comforting meal that requires minimal effort and cooks slowly to develop deep flavors.

Ingredients

Main Ingredients

  • 1 pound dried brown lentils
  • 1 medium onion, diced
  • 2 medium carrots, sliced
  • 2 medium celery stalks, diced
  • 3 garlic cloves, minced
  • 1 teaspoon ground cumin
  • 1/2 teaspoon ground coriander
  • 8 cups vegetable broth
  • 1 (14.5 ounce/411 gram) can diced tomatoes
  • Salt and pepper, to taste

Instructions

  1. Combine Ingredients: Place the lentils, diced onion, sliced carrots, diced celery, minced garlic, ground cumin, ground coriander, and vegetable broth into a slow cooker that is at least 3 quarts in size. Stir the ingredients gently to combine everything evenly.
  2. Cook Soup: Cover the slow cooker and cook the soup on high for 2 1/2 to 3 1/2 hours, or on low for 5 to 6 hours. The soup is ready when the lentils are soft and the vegetables are tender.
  3. Add Tomatoes: Stir in the canned diced tomatoes (with their juice) and continue to cook for an additional 20 minutes to heat the tomatoes through and allow their flavors to meld with the soup.
  4. Season and Serve: Taste the soup and season with salt and pepper as desired. Serve hot for a comforting and satisfying meal.

Notes

  • Use a rinsed and sorted lentils to remove any debris before cooking.
  • For thicker soup, reduce the amount of vegetable broth or cook uncovered for the last 30 minutes.
  • For a non-vegetarian version, broth can be substituted with chicken broth.
  • Add chopped fresh herbs like parsley or cilantro just before serving for added freshness.
  • This soup freezes well; store in airtight containers for up to 3 months.