Gut-Healthy Red Lentil Soup

This comforting red lentil soup is warmly spiced with turmeric, cumin, coriander, fennel, and ginger, with a spoonful of miso adding an unexpected depth of flavor. Made with split red lentils and pressure-cooked for easier digestion, it is a simple, nourishing meal with plenty of fiber and ingredients traditionally used to support digestive health.

Eating Split Red Lentils

For years, I avoided legumes because they simply didn’t agree with my digestive system. Over time, however, I discovered that not all legumes affect me in the same way. The variety we choose, how it is prepared, and even the spices we cook it with can make a noticeable difference.

Split red lentils, known as masoor dal in India, are whole red lentils that have had their outer skins removed before being split in half. Because they no longer have that fibrous outer layer, they cook quickly, become wonderfully soft, and are often easier to digest than whole lentils.

Pressure cooking can make them even gentler on digestion by reducing lectins and certain other anti-nutrients while softening the lentils thoroughly. It is one of the reasons a pressure cooker has become such a useful tool in my kitchen — not only for preparing quick meals, but also for making certain foods easier to tolerate.

You can read more about these preparation methods in my article How to Reduce Lectins in Your Favorite High-Lectin Foods.

This soup is inspired by Indian and Ayurvedic cooking, adapted to the ingredients I enjoy and the way I eat. Miso paste is not a traditional addition, but it brings a savory richness that rounds out the spices beautifully, so I don’t recommend skipping it. I use Hatcho Miso, a deeply flavored, long-fermented soybean miso made without grains.

Why is this Red Lentil Soup Gut Healthy?

Fiber to support the gut microbiome. Red lentils are a good source of dietary fiber, which supports regular digestion and provides nourishment for beneficial gut bacteria.

Split lentils for easier digestion. With their outer skins removed, split red lentils cook down into a soft, creamy texture and may be better tolerated than whole lentils, particularly when cooked thoroughly.

Pressure cooking to reduce anti-nutrients. Pressure cooking helps reduce lectins and certain other anti-nutrients naturally present in legumes. For people who find legumes difficult to digest, this preparation method may help minimize discomfort such as gas or bloating.

Spices traditionally used for digestion. Turmeric, fennel, cumin, coriander, and ginger are all commonly used in Ayurvedic and other traditional cuisines to support digestion. Ginger can help settle the stomach, while cumin may support the activity of digestive enzymes.

Ginger and garlic for flavor and digestive support. Along with creating the aromatic base of the soup, ginger and garlic contain naturally occurring plant compounds associated with digestive and broader health benefits.

Sesame oil for flavor and nutrient absorption. Raw, organic sesame oil contributes healthy fats and helps the body absorb fat-soluble nutrients from the meal. Use raw sesame oil rather than the more intensely flavored toasted variety.

Fermented miso for depth and complexity. Miso brings savory flavor along with compounds created during fermentation. Unpasteurized miso may also contain live cultures, although these are sensitive to heat, so only add it after you turn the heat off, and only in the portion you eat immediately.

Ingredients to Make Red Lentil Soup

To cook the lentils, you need:

• 1 cup split red lentils
• 4-5 cups water
• 2 bay leaves

To make tadka (the aromatics and spice flavoring):

• 3 tablespoons sesame oil (ghee or extra virgin olive oil can also be used)
• 1 teaspoon cumin seeds
• 1 teaspoon fennel seeds
• 1/2 teaspoon mustard seeds (black or yellow)
• 1 medium onion, finely chopped
• 1-2 teaspoons grated or minced garlic (about 3 garlic cloves)
• 2 teaspoons grated ginger
• 1 teaspoon garam masala
• 1 teaspoon turmeric powder
• 1 teaspoon ground coriander
• 3-4 dry curry leaves (you can omit if you don’t find them)
• Pinch of cayenne pepper
• Salt and pepper, to taste
• Optional: 2 tablespoons Miso (choose a high-quality miso paste, like Japanese Hatcho Miso)

For garnish:

• Fresh coriander (cilantro), chopped (or cilantro microgreens)
• Fresh lime or lemon juice

Step-By-Step Instructions:

Step 1: Prepare and pressure cook the lentils

Wash the split red lentils with cold water, until the water comes out clean. Combine the cleaned red lentils, water, and bay leaves in a pressure cooker. Cook under high pressure for 10 minutes. Once done, let the pressure release naturally, and remove the bay leaves.

Step 2: Make tadka (the spices and aromatics flavoring)

While the lentils are cooking, prepare the tadka (the mix of aromatics and spices cooked in oil). Heat the sesame oil in a small saucepan over medium to high heat. Add the cumin, fennel, and mustard seeds and let them temper for about 30 seconds. Add the chopped onion and sauté until translucent (about 3 minutes). Stir in the garlic and ginger, cooking briefly until fragrant, but ensure they do not brown (about 1 minute or less).

Mix in garam masala, turmeric, coriander, cayenne, and season with a little salt and pepper. Continue to cook on low-medium heat for about 5 minutes, stirring occasionally. If the spices stick to the pan, add a tiny bit of water, one tablespoon at a time.

Step 3: Mix tadka and lentils, and serve

Pour the spice mixture into the cooked lentils. Add some of the lentil water to the saucepan to remove all the delicious spices from the pan, and pour it back into the lentil pot.

Cook together on the stovetop for an additional 5 minutes to meld the flavors. Adjust seasoning with salt and pepper to taste, but not before adding the Miso paste, which will add some more flavor. If including miso, stir it into the soup just before serving to preserve its beneficial enzymes.

Ladle the soup into bowls and garnish with chopped fresh coriander and fresh lemon or lime juice, to your heart’s desire.

Notes

If you have leftovers, add miso only to the portion you are currently serving to maintain its health benefits in future servings. Remember, miso is salty; adjust the amount of added salt accordingly if you use it.

The texture of the soup can be adjusted by adding more hot water if desired (be careful as flavors will dilute). Four cups of water will create a thick, porridge-like consistency, while five cups of water will create a more liquid consistency. The soup will thicken as it cools down, so keep that in mind.

How to Serve This Red Lentil Soup

This soup is not only healthy, light, and nutritious, but it’s also incredibly versatile. Here are a few of our favorite ways to enjoy it:

• Simple and Fresh: Serve as is, topped with cilantro and broccoli microgreens, a drizzle of extra virgin olive oil, and a generous squeeze of lemon or lime.
• With Added Vegetables: Enhance the soup with seasonal roasted vegetables such as roasted cauliflower, asparagus, or broccoli for added texture and flavor.
• Protein Boost: For a heartier meal, incorporate additional protein like cooked chicken, meatballs, or ground beef.
• Meal Prep Friendly: Freeze in one-cup servings. It’s the perfect quick and nutritious lunch to reheat on busy days.

I hope you enjoy this soup as much as we do. Bon appétit!

If you love lentils, you might enjoy this Ayurveda-Inspired, Low-Lectin Kitchari Recipe or our Black Lentil Salad with Celery, Apple, and Toasted Pecans.

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