With a quick method and a variety of vegetables, this vegetarian Lentil Soup is an easy and nutritious weeknight family dinner—especially when you’re craving comfort food.
My family loves soup and over the years we’ve gone through phases of many favorites. This lentil soup, which has a load of veggies in the mix for a really delicious flavor, was in heavy rotation for about two years when my girls were little and it’s still one of my favorites.
Lentils are quick to cook, full of vegetarian protein and fiber, and pack a decent amount of iron. (Find my full list of iron-rich foods for kids.) They are also incredibly inexpensive, so having a package in the pantry is a great way to ensure you are never too far from a yummy family dinner.
This easy Lentil Soup recipe uses basic pantry staples and a straight forward cooking method to keep things easy even if you’re making this as a weeknight family dinner.
(This is a favorite soup for kids—and you may also like my Lentil Patties, Alphabet Soup, Black Bean Soup, Red Lentil Soup and Pastina Soup.)
Table of Contents
Your toddler won’t eat? Help is here!
Sign up for our email updates to get tips and ideas sent to your inbox.
Ingredients You Need
To make this vegetarian lentil soup you’ll need to have the following ingredients on hand and ready to go.
- Reduced-sodium broth: Chicken or vegetable broth can be used here depending on what you prefer.
- Crushed canned tomatoes: This type of tomato blends into the soup nicely and adds acidity, which helps ensure that the soup has plenty of flavor.
- Onion: I use yellow onions here, but white would work, too. You can also use frozen minced onion to reduce the prep time.
- Carrots: I usually peel and chop fresh carrots, but frozen diced carrots would also be an option. Alternatively, you can use sweet potato, either on its own or mixed with the carrot to add more flavor.
- Brown lentils: Brown lentils are my preference for this type of lentil soup and are what the recipe timing and liquid amounts are based on. (Green lentils and red lentils absorb liquids and cook at different rates, so they are not a good direct substitute here.)
- Garlic: You can use freshly minced garlic cloves or jarred minced garlic from the store.
- Thyme and bay leaves: I love the flavor of thyme in the mix with the other ingredients in this lentil soup, so I use it here. The bay leaves add more flavor, too.
Step-by-Step Instructions
Here’s a look at the easy process involved in making this vegetarian lentil soup. Scroll down to the bottom of this post for the full recipe, including the amounts and timing.
Step 1. Mince the vegetables. Heat olive oil in a medium pot over medium heat. And the vegetables, stir to coat, and cook until just starting to soften.
Step 2. Add the tomatoes and broth, cover, and bring to a boil.
Step 3. Remove cover, reduce heat to a simmer, and stir in the bay leaf and lentils. Cover slightly, and simmer until the lentils are soft.
Step 4. Serve warm with Parmesan cheese if desired..
How to Store
This lentil soup is delicious when it’s just made, but it tastes pretty great left over, too. It does thicken up as it chills, though, so you may want to add more broth when reheating.
Store it in an airtight container in the fridge for 3-5 days or in the freezer for up to 3 months. Thaw overnight in the fridge or on the defrost setting in the microwave.
What’s the best way to serve soup to my toddler?
If your toddler is still learning to like soup, start with a small serving to avoid overwhelming them with a new food. And you can give them something to dip into the soup, like crackers or corn bread muffins.
You can even puree it completely smooth and serve it in a reusable pouch.
Best Tips for Success
- Store leftovers in the fridge in an airtight container for up to 3 days or in the freezer for up to 3 months. Thaw in the fridge overnight or use the defrost setting on your microwave, then warm through at regular heat once thawed. Stir in a little water when reheating if the soup has become very thick.
- You can either grind the veggies into small pieces in a food processor or finely chop them with a knife. Finely chopped veggies helps ensure that the soup cooks in the times I mention throughout the recipe.
- You can also puree the finished soup for a smoother option.
- Top with Parmesan cheese, shredded cheese, additional salt and pepper, and/or hot sauce for parents as desired.
Related Recipes
I’d love to hear what your family thinks of this recipe if you make it so please comment below with feedback!
Favorite Vegetarian Lentil Soup
Ingredients
- 2 cups onion (finely chopped)
- 2 cups carrot (finely chopped; or try sweet potato)
- 2 cloves garlic (minced)
- 2 tablespoons olive oil
- 1 cup crushed tomatoes
- 1 quart reduced-sodium chicken stock (or vegetable broth)
- 1 teaspoon dried thyme
- 1 bay leaf (optional)
- ½ teaspoon salt
- 1½ cups dry brown lentils
- Parmesan, freshly minced parsley, cracked black pepper, additional salt to taste (optional to top)
Instructions
- Prep the vegetables. (Alternatively, you can roughly chop them and grind them in a food processor.)
- Heat olive oil in a medium pot over medium heat. And the onion, carrots, and garlic. Stir to coat with oil, and cook for about 6 minutes or until just starting to soften.
- Add the tomatoes, broth, thyme, salt, and bay leaf. Stir, then cover, and bring to a boil.
- Remove cover, reduce heat to a simmer, and stir in the lentils. Cover slightly, so the lid is just partly on and some steam can escape, and simmer until the lentils are soft or about 20-25 minutes
- (If the time has elapsed and the lentils are not yet fully softened, continue cooking and add a cup of water if needed.)
- Serve topped with additional toppings, if desired.
Notes
- Store leftovers in the fridge in an airtight container for up to 3 days or in the freezer for up to 3 months. Thaw in the fridge overnight or use the defrost setting on your microwave, then warm through at regular heat once thawed. Stir in a little water when reheating if the soup has become very thick.
- Puree the soup for babies or if you prefer a smoother soup consistency.
- Top with Parmesan cheese, shredded cheese, additional salt and pepper, and/or hot sauce for parents as desired.
Nutrition
This post was first published May 2018.
Can I use red lentils for this soup?
Green lentils and red lentils absorb liquids and cook at different rates, so they are not a good direct substitute here.
I actually love this. I made it for my fussy eater who is 14 months and he managed to eat all his portion of soup. Family members who don’t like lentils normally asked for some too. Will definitely be making it again
Ridiculously easy, great and flavorful for adults, and my new eater loved it!! I put some in a food processor to make it a bit easier for baby to eat. Great to freeze, too!
Hi! You featured this recipe in your slow cooker newsletter/recipe round up. How long do you cook all ingredients on low (or high) in the crockpot ?
7-8 hours on low, with everything in the pot together from the start. Enjoy
We absolutely love this recipe! My 3 kids, husband and I eat this soup and it’s the only lentil soup we eat. I have added zucchini at the end and it’s great! We also add some chili for the adult bowls
😀
Also, Amy is awesome! I make your quick lunches for my boy who started kindergarten.
I’m so glad to hear that!
Will diced tomatoes work in place of crushed tomatoes?
Sure
Very delicious! I added a splash of milk into mine. Very good!
I forgot to check the lentils before stopping the boil so they were a little tough. 😂 rookie mistake
Looking forward to trying this. Could you use canned lentils?
I haven’t tried that and since they are already cooked, you might want to reduce the liquid and cook the veggies first, then add the lentils towards the end.
Can red lentils be used instead of brown?
They can, though they cook much faster and breakdown more easily so the texture will be different than what’s shown here.
Would this be okay for a 10 month old?
Yes, should be fine!
Really good, i added zuccini and blended everything at the end. Parm cheese made it even better!
So so. Needs meat or bread or something for texture. No matter how well I sort and rinse the Lentils I inevitably bite into a rock of some kind. Not a fan.
That does sound unpleasant. Maybe try a different brand?