Cozy Lentil Soup with Walnut-Lemon Gremolata
There’s something about the first cooler days of fall that makes me want a warm pot of soup simmering on the stove.
This lentil soup caught my attention because it checks so many of the boxes I look for in an everyday meal: plants, fiber, protein, healthy fats, plenty of flavor, and ingredients you can actually find in your kitchen.
But what makes this one especially good is the topping.
Instead of stopping with a traditional lentil soup, it’s finished with a fresh mixture of walnuts, lemon, herbs, and olive oil. That little bit of crunch and brightness changes the whole bowl.
The original recipe comes from The Plant Based School, and I’ve adapted the preparation below while keeping the elements I particularly like.
Why I Like Lentils
Lentils are one of those foods I’d love to see more people eating regularly.
They provide both plant-based protein and fiber, which can make a meal much more satisfying. They’re also a source of folate, iron, magnesium, potassium, and other micronutrients.
This particular recipe provides approximately 16 grams of protein and 18 grams of fiber per serving, based on four servings in the original recipe.
That fiber is one of the reasons I especially like lentils for gut health. Fiber feeds our gut microbes, helps support regularity, and can contribute to steadier blood sugar and greater satiety.
And from my 30-plants-a-week perspective, look at how quickly this single meal adds up:
Lentils + onion + carrot + celery + garlic + spinach + walnuts + parsley + lemon
That’s potentially nine different plants in one bowl before you’ve even thought about the rest of your day.
Lentil Soup with Walnut-Lemon Gremolata
Makes approximately 4 servings
For the soup
2 tablespoons extra-virgin olive oil
1 onion, chopped
1 large carrot, sliced or chopped
1 celery stalk, chopped
2 garlic cloves, grated or minced
1 teaspoon paprika
1 teaspoon ground cumin
¼ teaspoon cinnamon, optional
1 cup dried brown or green lentils, rinsed well
6 cups reduced-sodium vegetable or chicken broth
About ¾ teaspoon salt, adjusting to taste
Freshly ground black pepper
4 ounces fresh spinach, or more if you like
For the walnut-lemon topping
⅓ cup walnuts, roughly chopped
¼ cup chopped fresh parsley or cilantro
2 tablespoons extra-virgin olive oil
Zest and juice from ½ lemon
A small amount of grated garlic, optional
Pinch of salt
Optional for serving
Plain Greek yogurt or Skyr
Extra herbs
Lemon wedges
Crusty whole-grain sourdough bread
How to Make It
Start by warming the olive oil in a large soup pot or Dutch oven over medium heat.
Add the onion, carrot, and celery and sauté for a few minutes, until the vegetables begin to soften.
Stir in the garlic, paprika, cumin, and cinnamon, if using. Let the spices cook briefly with the vegetables until fragrant.
Add the rinsed lentils and broth. Season lightly with salt and pepper and bring everything to a gentle boil.
Lower the heat and allow the soup to simmer uncovered until the lentils are tender, generally 30–45 minutes depending on the lentils you use.
Once the lentils are cooked, use an immersion blender to blend just a small portion of the soup. You’re not trying to purée the entire pot. Blending a little simply gives the broth a thicker, creamier texture while leaving plenty of whole lentils and vegetables.
Stir in the spinach and let it wilt for a minute or two.
Taste and adjust the seasoning.
Make the Walnut-Lemon Gremolata
While the soup cooks, roughly chop the walnuts and fresh herbs.
Combine them with the olive oil, lemon zest, lemon juice, a pinch of salt, and a little grated garlic if you enjoy it.
Keep the mixture fairly chunky rather than turning it into a paste. That texture is part of what makes the topping so good.
Ladle the soup into bowls and finish each serving with a spoonful of the walnut mixture.
My Calm Nutrition Addition: Add a Little More Protein
The lentils already provide a meaningful amount of plant protein, but depending on your individual protein needs, you may want to add a little more.
One very easy option is a spoonful of plain Greek yogurt or Skyr on top.
It adds creaminess while increasing the protein without changing the character of the soup very much.
You could also pair your soup with another protein source on the side rather than trying to make every gram of protein come from the bowl itself.
Don't Skip the Walnuts
It may be tempting to think of the walnut topping as optional, but I think it’s what makes this recipe memorable.
Walnuts provide plant-based omega-3 fat in the form of ALA, along with fiber, minerals, and polyphenols. The lemon and herbs also add brightness to what would otherwise be a fairly earthy soup.
It’s a good reminder that nourishing food doesn’t have to mean bland food.
Texture, acidity, herbs, spices, and healthy fats matter.
Those are often the things that turn a bowl of vegetables and lentils into something you genuinely look forward to eating.
Easy Substitutions
This is also a forgiving recipe.
No spinach? Try kale or Swiss chard.
No walnuts? Pecans, almonds, or hazelnuts can work.
You can use green lentils instead of brown, and canned lentils are an option when time is short. If using canned lentils, the original recipe recommends substantially reducing both the broth and cooking time.
You can also add extra vegetables depending on what you have in the refrigerator.
That’s one of my favorite ways to cook: use the recipe as a framework rather than feeling like every ingredient has to be exact.
Great for Meal Prep
This is a wonderful make-ahead lunch or dinner because lentil soup tends to become even more flavorful after it sits.
Store the soup and walnut topping separately in the refrigerator. The original recipe recommends refrigerating the soup for up to four days or freezing the soup, without the topping, for up to three months.
The soup will thicken as it sits, so simply add a splash of broth or water when reheating.
The Bigger Picture
Meals like this are a great example of what I mean when I talk about adding nourishment rather than constantly focusing on what to take away.
You're getting protein.
You're getting a substantial amount of fiber.
You're getting vegetables, legumes, nuts, herbs, and healthy fats.
And you're getting a meal that feels warm and satisfying.
That combination matters because the healthiest way of eating isn't the one you can follow perfectly for a few weeks. It's the one that gives your body what it needs and that you actually enjoy enough to come back to.
Enjoy!
— Yvette
Recipe adapted from The Plant Based School's Easy Lentil Soup with Smashed Walnuts.
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