Lemony Lentil Vegetable Soup with Rosemary & Fennel

Created by Laura Wright
5 from 6 votes

Make this simple lentil vegetable soup with roughly 12 ingredients and about 35 minutes of cooking time. Miso brings savory depth and lemon perks up the earthy lentils and vegetables. This vegan soup is light and hearty at the same time!

An overhead shot shows a bowl of lentil vegetable soup with a crust of bread perched on top. The soup is finished with finely chopped parsley. A spoon is sticking out of the bowl.

This simple lentil vegetable soup recipe is naturally hearty, but also vibrant and light. Green lentils and a mixture of chopped fennel, carrots, celery, and onions fill out the seasoned vegetable stock of this creation. Garlic, fresh rosemary, lemon zest and juice, plus a finishing hit of miso flavor this pot of goodness that cooks up in 35 minutes on the stove. You get deep umami from the miso, woodsy comfort from the rosemary, and the unmistakable bright notes of lemon. This vegan soup strikes the perfect balance of ease and coziness. Like most soups, it gets better as it sits, so it’s perfect for meal prep!

An overhead shot shows a bowl of lentil vegetable soup with a crust of bread perched on top. The soup is finished with finely chopped parsley. A spoon is sticking out of the bowl.
An overhead shot shows ingredients on a cutting board for a soup.
An overhead shot shows two plates. One has: minced garlic, lemon zest, and chopped rosemary. The other has: chopped fennel, carrots, celery, and onions.
For this soup, you will need to chop the following: carrots, celery, onion, fennel, garlic, rosemary, and lemon zest.

Simplicity is the name of the game with this vegetable lentil soup. I love the earthy flavor of lentils in combination with pine-y and woodsy fresh rosemary. Lemon and garlic naturally fit in here as well. With this powerhouse flavor trio, it’s hard to go wrong! This pot is packed with aromatic vegetables like fennel, celery, carrots, and onions that are first sautéed for a solid 10-12 minutes for maximum flavor development. I know that this sounds like a long time, but it adds so much to the final result!

This soup is minimal in terms of ingredients, so I do think it’s important to start off with a delicious vegetable stock. Homemade is ideal if you can swing it! My recipe for that is linked in the ingredients list below. Beyond that, I recommend seasoning well with salt and pepper and making any adjustments that you need to at the very end. I always find myself tweaking a soup in the final stages with acidic components, salt, pepper, something with a bit of heat etc.

More lentil soups!

If you want to add more vegetables, a couple handfuls of chopped spinach or kale would be nice here! Just drop them into the pot towards the end of the simmering time so that they get a couple minutes to wilt. I love to enjoy this soup with drizzles of chili oil or chili crisp on top (love this one). If you also crave the spice, I highly recommend it.

Hope you love this more simple offering from my kitchen! It hits at 12 ingredients (minus oil, salt and pepper), which is pretty minimal for me! If you’ve made any of my soups before, you know I like to load them up with spices, herbs, umami-boosters etc. Sometimes the pure goodness of the ingredients is just the thing though. Enjoy!

An overhead shot shows sautéed vegetables in a pot. Minced garlic, rosemary, and lemon zest have just been added.
An overhead shot shows green lentils being poured into a pot with sautéed vegetables.
An overhead shot shows a hand pouring a bowl of miso and vegetable stock into a pot of soup.
Adding a mixture of light miso dissolved with hot stock adds deep umami flavor to the lentil vegetable soup.
An overhead shot shows ladle emerging from a pot of lentil vegetable soup. The ladle portion is in harsh, direct sunlight.
An overhead shot shows a bowl of lentil vegetable soup with a crust of bread perched on top. The soup is finished with finely chopped parsley. A spoon is sticking out of the bowl.

Lemony Lentil Vegetable Soup with Rosemary & Fennel

Make this simple lentil vegetable soup with roughly 12 ingredients and about 35 minutes of cooking time. Miso brings savory depth and lemon perks up the earthy lentils and vegetables. This vegan soup is light and hearty at the same time!
5 from 6 votes
An overhead shot shows a bowl of lentil vegetable soup with a crust of bread perched on top. The soup is finished with finely chopped parsley. A spoon is sticking out of the bowl.
Prep Time: 25 minutes
Cook Time: 35 minutes
Total Time: 1 hour
Servings 4

Ingredients

  • 2 tablespoons olive oil
  • 1 medium yellow onion, small dice
  • 2 medium carrots, small dice
  • 2 sticks celery, small dice
  • 1 medium bulb fennel, cored and chopped small
  • sea salt and ground black pepper, to taste
  • 5 cloves garlic, minced
  • 1 tablespoon fresh rosemary leaves, minced
  • 1 teaspoon lemon zest
  • 1 teaspoon ground coriander
  • ¾ cup green lentils
  • 6-8 cups vegetable stock (see note)
  • 1 tablespoon light miso
  • 1 tablespoon lemon juice
  • cup chopped flat leaf parsley (optional)
  • chili oil, for serving (optional)

Notes

  • I say 6-8 cups of vegetable stock because I tend to like this on the much more soupy end with 8 cups of stock. Other folks might prefer a thicker texture. I recommend starting with 6 cups and going from there.
  • Take your time sautéing the vegetables in the first step. I know 10-12 minutes sounds like a long time, but it’s a lot of vegetables! You’re building a ton of flavour in this stage.
  • This soup has minimal ingredients, so I do recommend a super flavorful homemade vegetable stock here.

Instructions

  • Heat a heavy soup pot over medium heat. Once hot, pour in the olive oil. Add the onions, carrots, celery, and fennel all at once. Season with salt and pepper and stir. Sauté until vegetables are quite soft, about 10-12 minutes.
  • Add the garlic, rosemary, lemon zest, and coriander to the pot. Sauté until fragrant, about 1 minute.
  • Add the lentils and stir. Add 6 cups of vegetable stock and stir once more. Place the lid on top and bring the soup to a boil. Once boiling, lower the heat to a simmer and leave the lid on top, slightly askew so that some steam can escape.
  • Simmer until the lentils are tender, about 20 minutes.
  • Place the miso in a bowl and add a couple ladles of hot broth from the soup on top. Use a spoon to "dissolve" the miso into the broth. Pour this mixture into the soup and stir. Stir in the lemon juice and parsley, if using.
  • Check the soup for seasoning and adjust if necessary (more salt, pepper, lemon juice etc). Enjoy hot with chili oil on top if you like.
29/01/2025
Posted in: autumn, carrots, earthy, gluten free, lentils, main course, nut free, quick, refined sugar-free, salty, soup, spring, umami, vegan, winter

14 comments

5 from 6 votes

Recipe Rating





  • Laure

    5 stars
    Such a delicious and hearty soup! It was so easy to put together! The lemon zest and juice gave such a freshness to the soup. I didn’t have any fennel, but I finished by adding kale to it. Thank you!

  • PatCross

    5 stars
    This soup is delicious and it’s better on the next day!!!
    The seasoning is wonderful though I did add a piece of ginger to the mix.
    This recipe is a keeper!!

  • Carone

    5 stars
    I love lentils, fennel and lemon together. I added a little extra lentils because I love them but otherwise followed the recipe. It was delicious! Thanks for this and all your other recipes and inspiration.

  • n

    5 stars
    you are so right Laura, simple but flavourful. + I’m a sucker for fennel!

  • ELIZABETH

    5 stars
    Really delicious, with subtle floral notes from the coriander and fennel. The miso is a great addition. It’s going into the winter soup rotation at our house.

  • Allie

    I bought all the ingredients to make this tomorrow, thinking I had green/brown lentils but I don’t! So I’m just curious if you think it’d work with what I have or not. :)

  • Allie

    Could I sub black lentils?

    • Laura Wright

      Hi Allie, Black lentils are going to be more firm in a soup like this. If you’re fine with that, it’s a simple substitution. They will probably take 5-10 minutes longer to cook as well.
      -L

  • Mimi

    5 stars
    Looks great! Caution not to boil the soup after adding miso as this will destroy the beneficial bacteria.

    • Laura Wright

      Thanks for this, Mimi! Generally when I add miso to a soup or sauce, I am purely adding it for the deep umami flavor notes. I know that your note of caution will be useful information for lots of folks though.
      -L

  • Gina

    Beautiful recipe–thanks for sharing this. Will make this weekend (need to buy fennel). Always want to make a first-time recipe to the letter, and then decide if adaptations are needed (which I do not expect will be needed for this).

    • Laura Wright

      I appreciate this! It is an admittedly simpler soup than what I typically offer, but with the thorough sautéing of the vegetables and a rich stock, it is so satisfying. I hope you enjoy!
      -L

  • angela

    could i use canned lentils for this if that’s what i have? reduce the cooking time?

    • Laura Wright

      You could use canned lentils, but I would recommend reducing the vegetable stock if you’re doing this. Start with 4 cups and see if you need more. Using canned, totally cooked lentils means that you will not need to simmer the soup as long. I do honestly wonder how the flavor will be impacted overall by this though! I recommend really taking your time with the initial vegetable sautéing stage to extract maximum flavor :)
      -L