Tomato Lentil Soup

Emma Sullivan By Emma Sullivan January 17, 2025 4.7 (118 reviews)
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Tomato Lentil Soup

This tomato lentil soup is everything a healthy soup should be - hearty, satisfying, and packed with nutrients. The combination of protein-rich lentils, fiber-filled vegetables, and tangy tomatoes makes it a complete meal in a bowl that happens to be completely vegan and naturally gluten-free.

What makes this soup special is the balance of flavors: sweet tomatoes, earthy lentils, and a bright squeeze of fresh lemon that lifts everything. It's the kind of soup that makes you feel nourished from the inside out.

Nutritional Powerhouse

Lentils are among the most nutritious foods on the planet, and this soup showcases them beautifully. Here's what makes it so good for you:

  • Plant protein: About 15g per serving from lentils alone
  • Fiber: 12g per serving keeps you full longer
  • Iron: Lentils are one of the best plant sources
  • Folate: Essential B vitamin for cell health
  • Lycopene: Powerful antioxidant from tomatoes
  • Vitamin C: From lemon, parsley, and vegetables

Choosing Your Lentils

This recipe uses canned brown lentils for convenience, but you have options:

  • Canned brown lentils: Quick and easy, just rinse and add
  • Dried brown lentils: Cook in the broth for 25-30 minutes
  • Green lentils: Hold shape better, slightly firmer texture
  • Red lentils: Break down and thicken the soup naturally

If using dried lentils, you'll need about 1 cup (200g) and may need to add more liquid as they cook.

Building the Vegetable Base

The vegetables in this soup add both nutrition and texture. The combination of carrots, zucchini, onion, and celery creates a classic mirepoix-style base that provides sweetness and depth.

Take time to sauté the vegetables properly - about 10 minutes until softened. This step caramelizes their natural sugars and creates the foundation of flavor for the soup.

The Lemon Finish

Don't skip the fresh lemon juice at the end - it's what transforms this soup from good to great. The acid brightens all the flavors and cuts through the earthiness of the lentils. Add it just before serving for maximum impact.

Make It Your Own

This soup is wonderfully adaptable to your tastes and what you have on hand:

  • Spice it up: Add cumin, coriander, or a pinch of cayenne
  • More greens: Stir in spinach or kale at the end
  • Creamier: Blend half or swirl in coconut cream
  • Heartier: Add diced potatoes or sweet potatoes
  • Mediterranean: Top with feta and olives (not vegan)

Meal Prep and Storage

This soup is perfect for meal prep. It actually tastes better the next day as the flavors develop. The soup thickens as it sits because the lentils absorb liquid - just add water or broth when reheating.

It freezes beautifully for up to 3 months, making it ideal for batch cooking. Portion into containers for easy grab-and-go lunches.

Fresh ingredients gathered and ready for this recipe.
Fresh ingredients gathered and ready for this recipe.

Tomato Lentil Soup

Hearty, healthy vegan soup with brown lentils, zucchini, carrots, and tomatoes. Finished with fresh lemon and parsley for bright flavor.

Prep: 15 min
Cook: 25 min
Total: 40 min
Servings:
4

Nutrition per serving

285 Calories
15g Protein
42g Carbs
6g Fat
12g Fiber
9g Sugar

Ingredients

Instructions

  1. Sauté vegetables. Heat olive oil in a large saucepan. Add vegetables and cook 10 minutes, stirring.
  2. Simmer. Pour in broth and tomatoes. Cover and bring to boil. Reduce heat and simmer 15 minutes until vegetables are tender.
  3. Add lentils. Add lentils and simmer 5 minutes more. Season with salt and pepper.
  4. Serve. Ladle into bowls, squeeze over lemon juice, and garnish with parsley.

Recipe Notes

  • Storage: Refrigerate for 4-5 days. Soup thickens as it sits - add water or broth when reheating.
  • Freezing: Freezes well for up to 3 months in airtight containers.
  • Dried lentils: Use 1 cup dried lentils. Add with broth and simmer 25-30 minutes until tender.
  • Add spices: 1 teaspoon cumin or smoked paprika adds warmth and depth.