Spinach Lentil Soup

The beauty of this Lentil Spinach Soup lies in its beautiful simplicity. With just a handful of humble ingredients—onions, celery, carrots, garlic, potatoes, lentils, spinach, and a carefully curated blend of spices—you can create something wholesome, satisfying, and utterly delicious.

The combination of earthy lentils, potatoes, fresh spinach, and warm Mediterranean-inspired spices creates a flavor profile that’s both comforting and exciting. Add a squeeze of fresh lemon juice at the end, and you’ve got a bright, vibrant soup that wakes up your palate and leaves you craving more.

Spinach Lentil Soup

Lentils have been a staple of Mediterranean diets for thousands of years, prized for their ability to sustain and nourish. The Mediterranean region has long been celebrated for its light and healthy cooking style, and this soup draws inspiration from that tradition—as do Greek garbanzo bean soup with rice, rosemary bean and kale soup, gaspacho, and wild rice soup.

What makes this particular recipe special is its accessibility. It’s not overly complicated, doesn’t require hard-to-find ingredients, and comes together in a timeframe that fits into a busy modern lifestyle. You can serve it with homemade garlic bread, gluten-free dinner rolls, or focaccia.

It’s the soup you make when someone in your family is under the weather, the meal you prepare for friends who’ve just had a baby, the dish you bring to a potluck that everyone asks for the recipe. It’s comfort food in the truest sense, but comfort food that just happens to be incredibly good for you.

Ingredients You Will Need

Before we jump into the cooking process, let’s take a moment to understand each ingredient in this recipe. Knowing why certain ingredients are included and how they contribute to the final dish will make you a more confident and intuitive cook, enabling you to make smart substitutions when needed and truly understand the flavor profile you’re creating.

Serves: 5 / Prep Time: 10 minutes / Cook Time: 45 minutes / Total Time: 55 minutes

Onion: The recipe calls for a red or yellow onion, both of which work beautifully. Red onions are slightly milder and sweeter, while yellow onions have a more robust flavor that holds up well to longer cooking times.

Celery: Often overlooked, celery brings a subtle bitterness and herbal quality that balances the sweetness of the onion and carrot. It also contributes a pleasant textural element, even after cooking.

Carrot: Adding natural sweetness and a beautiful orange color, carrots are an essential component of this soup. They provide a touch of sweetness that balances the earthiness of the lentils and spices.

Garlic: What would a Mediterranean-inspired soup be without garlic? The two cloves called for in the recipe provide a pleasant garlic presence without overwhelming the other ingredients.

Lentils: Green lentils (often called French green lentils or Puy lentils) have a slightly peppery flavor and remain firm even after cooking. Brown lentils are the most common variety found in supermarkets and have a more earthy flavor. Both work well in this recipe, though brown lentils may require slightly longer cooking time. One of the wonderful things about lentils is that they don’t require soaking before cooking, making them incredibly convenient for weeknight meals.

Potatoes: As the potatoes cook, they release starch into the broth, helping to thicken the soup naturally and giving it a more luxurious texture.

Cumin and Coriander: Cumin brings warmth and a slightly nutty, peppery flavor, while coriander (the seed of the cilantro plant) offers a citrusy, slightly sweet note.

Tomato Paste: The tomato paste works behind the scenes to deepen the overall flavor profile, making the soup feel more robust and complete.

Lemon Juice: The final flourish! A squeeze of fresh lemon juice at the end brightens the entire soup, cutting through the richness and adding a vibrant acidity that wakes up the palate.

How To Make

1. Peel and dice onion and carrot. Dice celery. Makes sure they are finely diced to cook quickly. Mince garlic. Cut the potatoes into 1/2-3/4”/12-18mm cubes (smaller pieces will cook faster).

2. Heat olive oil in a large pot over medium heat. Add the diced onion and cook, stirring occasionally, for 3 minutes. Add the carrot, celery, and garlic and cook for 5 minutes, stirring regularly, until celery is beginning to soften.

3. Add the cumin, coriander, black pepper, tomato paste, and salt. Add the lentils. Cook for 1 minute, stirring consistently to coat everything in spices and oil.

4. Add the potatoes and broth. Stir to scrape everything off the bottom of the pot. Simmer for 30-40 minutes, until potatoes are just soft and the lentils are cooked through. Stir occasionally. Remove from heat and add the spinach leaves, stirring to just wilt them. Add lemon juice to taste.Taste and adjust salt and pepper as needed. Serve immediately or store in the fridge for up to 3 days. Spinach will turn brown as it sits but is still good to eat.

Frequently Asked Questions

Q: Can I use canned lentils instead of dried?

A: Yes, you can use canned lentils. Rinse them well and add them toward the end of cooking, just long enough to heat through. You’ll lose the texture and flavor that comes from simmering dried lentils in the broth.

Q: How can I make this soup creamier?

A: Blend a portion of the soup in a blender or with an immersion blender and stir it back into the pot. This creates a creamier, more cohesive texture without adding dairy.

Q: Can I use sweet potatoes instead of yellow potatoes?

A: Absolutely! Sweet potatoes add a lovely sweetness and beautiful color. They have a slightly different texture and may require a minute or two less cooking time, so check for doneness early.

Q: The soup thickened too much in the refrigerator. How can I thin it?

A: Simply add water or vegetable broth when reheating and stir until the desired consistency is reached. The soup will naturally thicken as it sits and the starches absorb liquid.

Q: Can I double this recipe?

A: Yes! This recipe doubles well. Just make sure you have a large enough pot and extend the cooking time slightly if needed.

Q: Is this soup suitable for a low-carb diet?

A: This soup is relatively high in carbohydrates due to the potatoes and lentils. For a lower-carb version, you could replace the potatoes with low-carb vegetable.