When you need a meal that is both incredibly filling and comes together with minimal fuss, this Hearty One-Pot Lentil Potato Soup is the perfect recipe. It combines the earthy, fiber-rich goodness of brown lentils with tender, starchy potatoes, creating a thick, chunky texture that is pure comfort. Ready in under an hour, this easy lentil potato soup is the ultimate budget-friendly, family-approved dinner.
The simplicity of this one pot lentil soup lies in its layered flavor base. We sauté the carrots, onion, and garlic first, then bloom the tomato paste and dried herbs before adding the liquid. This simple stovetop method ensures the final broth is savory and deeply seasoned. Best of all, this recipe is naturally vegan lentil potato soup friendly, making it a healthy meal for everyone.
Table of Contents
Why You’ll Love This Soup
- 45-Minute Finish: Quick prep and an efficient simmer time mean dinner is ready fast.
- One-Pot Cleanup: Everything cooks together in a single large pot or Dutch oven.
- Hearty & Filling: Potatoes and lentils together create an incredibly satisfying, high-fiber, and high-protein meal.
- Versatile: Can be left chunky or blended smooth for a velvety texture.
Ingredients
- 2 Tbsp Vegetable Oil
- ¼ cup Diced Onion
- 1 Large Carrot, diced
- 3 cloves Garlic, minced
- 2 Tbsp Tomato Paste
- 1 ¼ cups Brown or Green Lentils, rinsed
- 12 oz Potatoes (small red or yellow), cut into ½-inch bite-sized pieces
- 4–5 cups Vegetable Stock or Water
- 2 tsp Salt
- ¼ tsp Black Pepper
- ½ tsp Dried Oregano
- ¼ tsp Dried Thyme
- Optional: ¼ cup Tomato Sauce
Instructions (Stovetop Method)
- Sauté Aromatics: Heat the vegetable oil in a large pot or Dutch oven over medium heat. Add the onion and cook for 1 minute. Stir in the garlic and carrots and cook for 2–3 minutes, stirring often, until they begin to soften.
- Bloom Paste: Stir in the tomato paste and optional tomato sauce. Cook for 1 minute, stirring constantly, to deepen the tomato flavor.
- Add Lentils and Liquid: Add the rinsed brown lentils and potatoes to the pot. Pour in 4 cups of vegetable stock or water.
- Season and Simmer: Stir in the salt, pepper, oregano, and thyme. Cover the pot and bring the soup to a boil. Reduce the heat to medium-low and simmer for 25 to 35 minutes, until the lentils are tender and the potatoes are cooked through and easily pierced with a fork.
- Adjust and Serve: If the soup is too thick, stir in up to 1 more cup of stock until your desired consistency is reached. Taste and adjust the seasoning (salt, pepper, herbs). Serve warm.
Storage and Expert Tips
- Lentil Choice is Key: Use brown or green lentils. Do not use red split lentils alone, as they break down completely in about 15 minutes, long before the potatoes are tender, resulting in a mushy texture.
- Washing Lentils: Always pick through and rinse your brown lentil and potato soup lentils before use to remove any small debris. Soaking is not necessary for this recipe.
- For Thickness: To naturally thicken the soup, use the back of a spoon to mash a few of the tender potato piecesagainst the side of the pot as the soup finishes simmering.
- Flavor Swap: Substitute the water with vegetable stock (or chicken stock, if not vegan) for a much richer, savory final broth.
Variations
- Blended Smooth: For a creamier texture (great for toddlers), use an immersion blender to partially or fully blend the soup before serving.
- Add Greens: Stir in 1 cup of chopped baby spinach or kale during the last 5 minutes of simmering.
- Spice Boost: Add a pinch of red pepper flakes or a dash of smoked paprika along with the dried herbs.
- Protein: Stir in 1 cup of cubed, cooked ham or pre-cooked sausage for a non-vegan version.
If you’re focusing on healthier meals and minimizing dishes, don’t miss our roundup of 10 healthy crockpot recipes to try in 2026!
Serving Suggestions
- Sides: Crusty bread, grilled cheese sandwich, or bread rolls.
- Garnish: Fresh parsley, a squeeze of fresh lemon juice (for brightness), or hot red pepper flakes.
Frequently Asked Questions
Q: Do I need to soak the brown or green lentils before using them? A: No. Brown and green lentils do not require pre-soaking. Simply pick through them to remove debris and rinse them well before adding them to the pot.
Q: Can I use sweet potatoes instead of regular potatoes? A: Yes. Sweet potatoes can be substituted for the potatoes, but be aware that the soup will have a noticeably sweeter flavor profile. Ensure the sweet potatoes are cut into uniform pieces and check for doneness.
Q: How do I store and reheat this easy lentil potato soup without it becoming too thick? A: Store the soup in an airtight container for up to 4 days in the refrigerator. When reheating, the starches will have absorbed liquid, so add a splash of water or vegetable stock to loosen the soup back to the desired consistency.
Q: Can I make this one pot lentil soup in the slow cooker? A: Yes. Add all ingredients to your slow cooker. Cook on LOW for 6–7 hours or on HIGH for 3–4 hours, until the potatoes and lentils are fully tender.
One-Pot Lentil Potato Soup
Equipment
- Large pot or Dutch oven
- Cutting board
- Chef’s knife
- Wooden spoon
Ingredients
- 2 Tbsp vegetable oil
- ¼ cup diced onion
- 1 large carrot, diced
- 3 cloves garlic, minced
- 2 Tbsp tomato paste
- 1 ¼ cups brown or green lentils, rinsed
- 12 oz potatoes, chopped into 1/2-inch pieces
- 4–5 cups vegetable stock or water
- 2 tsp salt
- ¼ tsp black pepper
- ½ tsp dried oregano
- ¼ tsp dried thyme
- ¼ cup tomato sauce (optional)
Instructions
- Heat the oil in a large pot over medium heat. Add the onion and cook for 1 minute. Stir in garlic and carrots and cook 2–3 minutes until softened.
- Stir in tomato paste and optional tomato sauce. Cook 1 minute to deepen the flavor.
- Add lentils and potatoes. Pour in 4 cups of stock or water.
- Stir in salt, pepper, oregano, and thyme. Cover, bring to a boil, then reduce heat and simmer 25–35 minutes until lentils and potatoes are tender.
- If needed, add up to 1 extra cup of stock to reach desired consistency. Taste and adjust seasoning before serving.