Slow Cooker Chicken and Red Lentil Soup with Fennel
on Sep 12, 2017, Updated Jan 22, 2025
This post may contain affiliate links. Please read our disclosure policy.
This thick and satisfying soup has tailgating or sidelines or post-game meal written all over it.

This is the Story of The Day I Became a Tailgating Football Mom. Or something like that.
So, I live in New York City. If you’ve never been, it looks much as it does on TV. Lots of people, tall buildings, subways, commerce, noise. I love it and smile acceptingly when people often comment, “Oh, I love to visit, but I wouldn’t want to live there.” That’s cool. More overpriced gyros for the rest of us.
By signing up, you agree to our Privacy Policy.
And both my kids played middle and high school football. One of the first things any non-New Yorker will say upon hearing that is, “WHERE? Where do they play? That’s so weird.”
These are reasonable questions. The answer is that they played some games at competing schools’ fields when those schools were in the surrounding boroughs or suburbs. And, their practices and “home games” took place on Randall’s Island, a strange little island across the East River that has a large number of sports fields dispersed amongst a few structures such as a Golf Center, a Sewage Treatment Plant, and a Mental Hospital.
What's In This Post?

Slow Cooker Chicken and Lentil Soup with Fennel: This thick and satisfying lentil soup has tailgating or sidelines or post-game meal written all over it.
Only when I put things like this down on paper do I realize how odd it sounds. And how I am actively confirming non-New Yorkers’ perceptions that we live a very singular existence here in our fair city.
Anyway, the first time I made this soup, I ended up bringing it to Jack’s football game right in the slow cooker. Gary (who is now a 30-year veteran New Yorker) thought this was just plain odd (even though he grew up in Worcester, Massachusetts, where I gather things like this happen all the time).
On the car ride there, Gary kept asking where I would put the soup and how I would serve it, as though I was planning to bring crème brûlée and a blowtorch to the field. The boys had already left for the game; had they been home, they would absolutely have lent their voices to the “this-is-so-weird” protest.
We arrived at Randall’s Island and luckily got the really, really good field, the one upwind of the Sewage Plant, and with actual bleachers. Someone had actually brought a table for people to drop off snacks on (thus solving the problem of where I would put it), and I dropped off the soup with a ladle and some plastic bowls and spoons (thus solving the problem of how I would serve it).

It was the final game, the Super Bowl, of their league against their arch-rival school, and tensions were high. I will spare you the blow by blow, and jump right to the part where my kids’ school won, completing their second undefeated season in the history of the high school. (It’s like I just discovered the italics key for the first time, and I am born again as a writer.)
Oh, and the soup? Gone. And adorable 16-year-old girls came up to me all day and said, “Did you make the soup — it was so good!” which I may or may not need to tell you makes a middle-aged woman feel terrific.
God, that was a long story. Anyway, this soup is pretty good: thick, fragrant with cumin and coriander, and kind of dal-like in personality. I would definitely add the fresh parsley at the end, though the football game is purely optional.
Ingredients
- Onion – Any kind of onion will work here.
- Garlic – See how to mince garlic, but don’t worry about mincing it finely for this soup.
- Fennel – Remove the hard core before chopping. If you want, you can reserve the fronds (the leafy, green parts that look like dill) and stir them in with the parsley at the end.
- Carrots – Add sweetness and contribute to the gorgeous orange color of this soup.
- Dried red lentils – The slow cooker is a great way to make red lentil soup. They will soften and break down and start to thicken the soup.
- Spices – I add ground cumin and coriander to this soup as a sort of callback to red lentil dal.
- Chicken breasts – Use boneless, skinless chicken breasts to avoid having to prep the chicken at all before throwing it in.
- Chicken broth – The amount of broth is key here to avoid having a soup that is too thick or too thin.
- Canned crushed tomatoes – Add body to the soup. And so much flavor.
- Salt & pepper – To taste.
- Fresh parsley – Gets stirred in right at the end to preserve its fresh flavor and color.
How to Make Red Lentil, Fennel, and Chicken Slow Cooker Soup
- Combine: Add the onion, garlic, fennel, carrots, lentils, cumin, coriander, chicken, broth, and tomatoes to your slow cooker. Season to taste.
- Cook: Set the slow cooker to high and cook for 4 hours. Set it and forget it, pretty much!
- Serve: Once done cooking, taste the soup and adjust the seasonings if you want to. Stir in fresh parsley and serve.
FAQs
Yes, you should rinse lentils before cooking them. Like any dried product (like beans or rice), dried lentils (of all colors) can sometimes contain small rocks or sand. Rinsing ensures that you don’t get sand in your soup.
Lentils contain starches that bloom and thicken when cooked in liquid. They contain more starch than other pulses like beans or peas, so you may be surprised at just how thick your lentil soup gets. Also, red lentils get very soft and also break down, thickening the coup into almost a porridge-like consistency. If it’s too thick for your taste, just add more broth to thin it out. The longer they cook, the more the lentils will thicken the soup.
Storage and Leftovers
- This soup will keep in the fridge for up to 5 days, well covered. Reheat in a pot over medium-low heat. It will thicken in the fridge, so you will likely have to add more broth or water to thin it out.
- You can also freeze this soup. Defrost in the fridge overnight. It will also need thinning out when reheating.
What to Serve With Chicken and Red Lentil Soup
More Great Slow Cooker Recipes
- 2 Ingredient Slow Cooker BBQ Pulled Pork
- How to Make Shredded Chicken In the Slow Cooker
- Slow Cooker Teriyaki Beef Tip Steaks
- Slow Cooker BBQ Beer Beef Stew
Pin this now to find it later
Pin It
Slow Cooker Red Lentil, Fennel, and Chicken Soup
Equipment
Ingredients
- 2 onions (chopped)
- 3 cloves garlic (minced)
- 1 large fennel bulb (cored and chopped; about 1 1/2 cups)
- 2 large carrots (peeled and chopped; about 1 cup)
- ½ pound dried red lentils
- 1 teaspoon ground cumin
- 1 teaspoon ground coriander
- 2 pounds boneless skinless chicken breasts (diced small)
- 5 cups less-sodium chicken broth
- 1 28-ounce can crushed tomatoes
- Kosher salt and freshly ground black pepper (to taste)
- ½ cup roughly chopped fresh parsley (plus more to serve if desired)
Instructions
- In a large (5-quart or more) slow cooker, combine the onion, garlic, fennel, carrots, lentils, cumin, coriander, chicken, broth, and tomatoes. Season with salt and pepper.
- Cook on high for 4 hours. Taste and adjust the seasonings as needed. Stir in the parsley and serve. Sprinkle servings with additional parsley if desired.
Notes
- This soup will keep in the fridge for up to 5 days, well covered. Reheat in a pot over medium-low heat. It will thicken in the fridge, so you will likely have to add more broth or water to thin it out.
- You can also freeze this soup. Defrost in the fridge overnight. It will also need thinning out when reheating.
This recipe looks so yummy!! Preparing fot the family soon!!!
Thanks themom100
I love this concept – first time I made it, I subbed the turkey for cooked leftovers from Thanksgiving, then used a freshly home-made turkey broth. Also subbed cilantro for the parsley, which was AMAZING. Thanks!
So glad to hear! What a great modification – it’s a very flexible recipe. Love the cilantro addition.
Just made this soup – it is delicious. I added more cumin and a little paprika. A delicious recipe on a cold Michigan day!
so glad!!
I love this recipe, I will try it here in Africa for my hubby this summer
I love that the recipe will be made in Africa!
This recipe looks absolutely delicious, may add in a few of my own seasonings.
By the way, make the printable recipes one page, if possible. thanks.
thank you! will look into making that happen….
This looks delicious!! If you want to put it on in the morning and have it ready when you get home, could you just do it for longer on low? Or will it get too mushy? Thanks!
I would say yes — it’s fairly mushy soup to begin with, which just works here (in my opinion) so I don’t think it will change all that much if you make those adjustment.
Love the football story!
Your soup sounds amazing. I love Fall and winter because I can have soup for dinner at least once a week. Or more. There’s usually leftovers.
I’m on a soft foods regime right now so I think this will be perfect. I’m getting the ingredients today!
Thank you for your monthly newsletter of recipes. The hardest part about dinner is figuring out what to fix.
it’s true — not having a plan is usually the thing that makes dinner not happen!
Is there a good substitute for the fennel bulb? My rural area markets don’t carry fennel.
You can just use celery, about 4 stalks! If you want do add a pinch of crushed anise seed for that slight licorice-y flavor go ahead!
Slow cooker soups are amazing! They’re so creamy and tasty, can’t wait to try this recipe!
Can’t wait to hear what you think!
Kattie! Lol the Super bowl, this sure looks yummy, i will try it out after vacation.
it will be even better when the weather gets colder!