October 12, 2020/Recipes

Recipe: Spicy Lentil and Kale Soup

This hearty soup offers lots of kick

Lentil and Kale soup

This big-batch soup will wow you with flavor and hearty goodness. It offers a blend of onions, leeks and garlic with lots of spices, including thyme, black pepper, cumin and a surprising ingredient: hot sauce. All this flavor with fiber-rich lentils and kale are sure to keep you feeling full and satisfied. It’s perfect for when you want to feed a crowd, or are looking for a recipe to have leftovers for throughout the week!


Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy


4 cups onions – diced
4 cups leeks – diced, white part only
3 teaspoon fresh garlic – minced (about 2 medium-size cloves)
¼ cup tomato paste
6 cups crushed tomatoes – or two 28-ounce can crushed tomatoes
8 cups low-sodium vegetable stock
3 cups carrots – peeled and diced
3 cups celery – diced
2 teaspoon black pepper
3 teaspoon dried thyme
1 teaspoon cumin
½ cup balsamic vinegar
3 tablespoon hot sauce
2 cup red lentils
6 cups kale – stems removed, blanched and chopped


  1. In a large pot on medium heat, add onions, and dry sauté slowly on low flame in a covered pot stirring frequently until onions are lightly caramelized.
  2. Add leeks, cook until soft.
  3. Add the garlic and cook until fragrant.
  4. Add tomato paste and stir until well blended and sauté on low flame stirring frequently for two minutes.
  5. Next, add crushed tomatoes, vegetable stock, carrots, celery, dried spices, balsamic vinegar and hot sauce.
  6. Cover, bring to a boil, then simmer for 15 minutes.
  7. Add lentils, reduce to a simmer and cook covered for about 15 minutes or until lentils become tender while stirring often (every three minutes).
  8. After the soup is ready, add and mix in kale and serve.

Chef’s Notes

About two medium bunches of kale will equal 3 cups blanched and chopped. Kale can easily be substituted with chard or spinach.

Nutritional Information (per serving)

Makes 22 servings. Serving size: 1 cup.

Calories: 137
Total fat: 1.3 g
Saturated fat: 0.9 g
Sodium: 223 mg
Total carbohydrates: 26.4 g
Dietary fiber: 9.5 g
Total sugars: 7.5 g
Protein: 7.7 g
Iron: 3 mg
Potassium: 498 mg


Learn more about our editorial process.

Related Articles

pumpkin lentil soup
February 6, 2024/Recipes
Recipe: Pumpkin Lentil Soup

A delicious soup for any season

Meal prepping various dishes for snack, lunch and dinner
January 29, 2024/Recipes
75 Healthy Meal Prep Ideas for Breakfast, Lunch and Dinner

No more scrambling to figure out what to eat during your busy week

Top view of a bowl of chili topped with sour cream and jalapeños with tortilla chips for dipping.
November 23, 2023/Nutrition
Recipe Adventure: How To Build a Better Bowl of Chili

From meat to beans, we’ve got some ideas to help you create the perfect-for-you chili recipe

bowl of cauliflower cheddar soup
May 15, 2023/Recipes
Recipe: Roasted Cauliflower and Cheddar Soup

Forgo the fat, opt for flavor with this savory soup

Chicken, squash and wild rice soup
May 8, 2023/Recipes
Recipe: Chicken and Squash Stew With Wild Rice

Perfect for a rainy spring day

Raspberry smoothies in half glasses topped with fresh raspberries placed on a dark grey tray.
April 25, 2023/Recipes
Recipe Adventure: Tasty Ways To Reach Your Daily Fiber Goal

10 delicious dishes with 10+ grams of fiber per serving

Bowl of tomato and vegetable soup.
March 6, 2023/Recipes
Recipe: Easy Vegetable Tomato Soup

A versatile recipe full of veggie goodness

black bean burger and salsa
January 12, 2023/Recipes
Recipe Adventure: 8 Fiery Foods To Spice Up Your Life

Try these easy-to-prepare dishes to make your forehead sweat and your tongue tingle

Trending Topics

Person in yellow tshirt and blue jeans relaxing on green couch in living room reading texts on their phone.
Here’s How Many Calories You Naturally Burn in a Day

Your metabolism may torch 1,300 to 2,000 calories daily with no activity

woman snacking on raisins and nuts
52 Foods High In Iron

Pump up your iron intake with foods like tuna, tofu and turkey