Lemon Red Lentil Potato Soup

This lemon red lentil potato soup is hearty, comforting, and bright, with creamy red lentils, russet potatoes, fresh herbs, smoked paprika, and plenty of lemon. It’s naturally vegan, made with simple ingredients, and comes together in one pot for an easy, satisfying meal.

This is my all-time favorite soup. It has everything I want in a bowl: potatoes for heartiness, red lentils for a thick and creamy texture, lots of vegetables, fresh herbs, and enough lemon juice to brighten the whole thing up.

But one of my favorite things about this soup is actually the garlic.

The Secret Is Slowly Cooking the Garlic

Instead of quickly sautéing minced garlic with the other vegetables, I start this soup by adding sliced garlic and olive oil to the pot over low heat.

The garlic gently cooks for 10–15 minutes while I chop the onion, carrots, and celery. The goal isn't to brown or fry it. You want it to slowly soften and infuse the olive oil with garlic flavor.

This creates a mellow, savory garlic flavor throughout the soup without the sharper, more overpowering bite garlic can sometimes have.

Once the garlic has had its head start, the onion, carrots, and celery go into that flavorful oil and cook until softened. Smoked paprika and black pepper add another layer of savory flavor before the potatoes, red lentils, and vegetable broth join the pot.

Why Lemon Works So Well in Red Lentil Soup

Red lentils and russet potatoes create a hearty, earthy base, so fresh lemon juice is important for balancing the soup. The acidity cuts through that richness and makes the whole pot taste brighter and fresher.

I add the lemon juice after the soup has finished simmering rather than cooking it with the lentils and potatoes. This preserves that fresh citrus flavor.

Fresh dill, parsley, and thyme go in at the same time. Dill is especially good with the lemon, parsley adds freshness, and thyme brings an earthy, savory flavor that complements the potatoes.

The result is a hearty potato lentil soup that still tastes surprisingly bright.

Why You'll Love This Lemon Red Lentil Potato Soup

This is one of those recipes that manages to be both comforting and fresh. Red lentils and potatoes make it substantial enough for a full meal, while lemon and fresh herbs keep it from feeling too heavy.

It's also naturally vegan without relying on substitutes to make it satisfying. Red lentils add plant-based protein while simultaneously thickening the soup, and russet potatoes become especially creamy when blended. Each serving has about 17 grams of protein and 10 grams of fiber, making it a nutritious and filling option for lunch or dinner.

It’s budget-friendly, too. Lentils, potatoes, carrots, celery, and onions are affordable kitchen staples, and together they make a seriously big pot of soup. This recipe is great for feeding a crowd, meal prepping for the week, or stocking your freezer with an easy meal for later.

Everything cooks in one pot, and you can adjust the final texture depending on what you're craving.

Frequently Asked Questions

Do red lentils need to be soaked before making soup?

No. You don't need to soak red lentils before making this soup. Just rinse and drain them well before adding them to the pot. They soften and begin to break down as the soup simmers.

Can I blend this red lentil potato soup?

Yes! You can leave this soup unblended and rustic, partially blend it, or blend it until smooth and creamy. I make it both ways depending on what I’m in the mood for.

Leaving it unblended gives you more texture and distinct bites of potato, carrots, celery, and onion, while the red lentils naturally break down and thicken the broth as they cook.

Blending creates a thick, creamy soup without needing any dairy, coconut milk, or cream substitutes. It’s also a great option when you don’t feel like chopping your vegetables carefully. If you know you’re going to blend the soup, a rough chop is perfectly fine as long as everything is small enough to cook through.

For something in between, give the soup just a few passes with an immersion blender. You’ll get a thicker, creamier base while still keeping some of the potatoes and vegetables intact.

When should you add lemon juice to lentil soup?

Add fresh lemon juice toward the end of cooking, after the lentils and potatoes are tender. Adding it at the end preserves more of its bright citrus flavor.

What herbs go well with lemon lentil soup?

Parsley, dill, or thyme all work beautifully in lemon lentil soup, each complementing the flavors a little differently. Parsley is my default choice, but I also like dill in the spring and thyme in the fall and winter. Use whatever you have on hand. Each herb plays well with the bright lemon, plus the hearty lentils and potatoes.

If you don't have fresh herbs, 1 tbsp dried herbs work well too. Herbs de Provence, Italian seasoning, or dried parsley are all great options. Add dried herbs along with the smoked paprika and black pepper so they have time to bloom and infuse the soup with flavor as it cooks.

How do you make lentil soup creamy without dairy?

You don't need a dairy or non-dairy cream at all. Blending cooked red lentils and potatoes creates a naturally creamy consistency. An immersion blender makes it especially easy because you can blend the soup directly in the pot.

How do I store the soup?

Store leftover soup in an airtight container in the refrigerator for up to 4–5 days, or freeze it for up to 3 months. The lentils and potatoes will continue to absorb liquid as the soup sits, so it will thicken considerably in the fridge. When reheating, simply add a splash of vegetable broth or water until it reaches your preferred consistency. I also like to add a fresh squeeze of lemon after reheating to brighten the flavors back up.

Print

With ImageWithout Image

Lemon Red Lentil Potato Soup

Yield: 10

Author: Megan Breakenridge

This hearty vegan lemon red lentil potato soup is made with creamy red lentils, russet potatoes, vegetables, fresh herbs, smoked paprika, and plenty of fresh lemon. Leave it chunky or blend it for a naturally creamy soup.

Ingredients

• 2 tablespoons (30ml) olive oil
• 1 large onion, minced (about 1½ cups / 254g)
• 4 stalks celery, minced (about 1 cup / 148g)
• 3 large carrots, peeled and minced (about 1¼ cups / 170g)
• 4 cloves garlic, thinly sliced (30g)
• 2 teaspoons (7g) smoked paprika
• ½ teaspoon (1g) ground black pepper
• 3 cups (600g) dry red lentils, rinsed and drained
• 3 large russet potatoes, peeled and cut into ½-inch cubes (788g)
• 10 cups (2.4L) vegetable broth
• 1¾ teaspoons (10g) salt
• ¼–½ cup (60–120ml) fresh lemon juice, from about 1–2 lemons, to taste
• 1 cup loosely packed (25g) mixed fresh parsley, dill, or thyme, minced

Instructions

1. Add the olive oil and sliced garlic to a large pot. Cook over low heat for 10–15 minutes while you prepare the onion, carrots, and celery. Keep the heat low so the garlic gently softens and infuses the oil without browning.
2. Add the onion, carrots, celery, and salt. Increase the heat to medium and cook for 10–15 minutes, stirring occasionally, until the vegetables begin to soften.
3. Add the smoked paprika and black pepper. Cook for 1–2 minutes, stirring frequently, until fragrant.
4. Add the vegetable broth, potatoes, and rinsed red lentils. Increase the heat and bring to a boil.
5. Reduce the heat to medium-low, cover, and simmer for 30–40 minutes, or until the potatoes and lentils are completely tender.
6. Remove from the heat and stir in the fresh lemon juice and herbs. Taste and adjust the salt, pepper, or lemon juice as needed.
7. For a rustic soup, serve as-is. For a creamy soup, use an immersion blender to partially or completely blend the soup to your desired consistency.

Notes

Garlic: Slowly cooking sliced garlic in olive oil over low heat gives the soup a mellow, deeply infused garlic flavor without overpowering it. Keep the heat low enough that the garlic doesn't brown.

Blending: Serve this soup unblended, partially blended, or fully blended. If you plan to blend it, you don't need to finely or uniformly chop the vegetables.

Consistency: The soup will continue to thicken as it cools and after refrigeration. Add a splash of vegetable broth or water when reheating as needed.

Lemon: For the brightest flavor, add the fresh lemon juice after the soup has finished simmering. Start with ¼ cup (60ml), or about the juice of 1 lemon, and add more to taste. I typically use ⅓–½ cup (80–120ml), or about 2 lemons, because I love a bright, lemony soup. Add the lemon juice after the soup has finished simmering to preserve its fresh citrus flavor.

Herbs: Use fresh dill, parsley, or thyme depending on the season, your preference, or simply what you have on hand. If you don't have fresh herbs, substitute 1 tablespoon dried herbs, such as Herbs de Provence, Italian seasoning, or dried parsley. Add the dried herbs with the smoked paprika and black pepper so they have time to release their flavor as the soup cooks.

Nutrition Facts

Calories

339

Fat

4.5 g

Carbs

60 g

Fiber

10 g

Protein

17 g

Per 480g serving

You May Also Like: