Low Calorie Tomato Red Pepper Soup in a Slow Cooker

Red Bell Pepper Tomato Soup in the Crock Pot

This Low Calorie Tomato Red Pepper Soup in a Slow Cooker is vegan, healthy, and just 38 calories per cup! I make this healthy soup from fresh tomatoes, and fresh bell peppers. Making this tomato soup extra healthy and delicious.

Red Bell Pepper Tomato Soup in the Crock Pot

Everything You’ll Need

  • Olive oil spray
  • 6 Roma tomatoes 
  • 2 red bell peppers
  • 1 yellow onion
  • 3 garlic cloves
  • ½ teaspoon salt
  • ¼ teaspoon pepper
  • ½ cup tomato paste
  • 2 cups reduced-sodium vegetable broth
  • 1 tablespoon fresh basil
  • Metric Measurements Below in Recipe Card!

Low Calorie Tomato Red Pepper Soup in a Slow Cooker

Red Bell Pepper Tomato Soup in the Crock Pot

Healthy Tomato Red Pepper Soup Meal Prep and Storage

Meal Prep – Cook the soup and then allow to cool completely. Scoop single servings into individual containers, or family sized servings into gallon freezer bags (or jars/containers with lids). 
Frozen Soup – Be sure any container is only filled 2/3 full as the soup will expand in the freezer. Store for up to a month in the freezer. If freezing gallon bags, lay flat to freeze to save storage room. 
Refrigerated Soup – Will hold in the refrigerator for 4 days.
Reheating – Add to a medium or large sauce pot, heat frozen for 30 minutes on low, or defrosted soup for 5-10 minutes over medium-low heat.

Low Calorie Tomato Red Pepper Soup Recipe

Red Bell Pepper Tomato Soup in the Crock Pot

Low Calorie Tomato Red Pepper Soup

Lose Weight By Eating
This vegan tomato soup with bell peppers is just 38 calories per cup… and it travels well for work lunches!
The red bell pepper tomato soup in the crockpot is so low in calories, you can serve it with rustic bread or 1/2 a sandwich without hurting your diet.
Personally, I like to enjoy this crock pot tomato soup as a snack. Sipped out of a coffee mug on a cold day.
5 from 1 vote
Prep Time 10 minutes
Cook Time 3 hours 45 minutes
Total Time 3 hours 55 minutes
Course lunch, Side Dish, starter
Cuisine American
Servings 10 servings
Calories 38 kcal


  • slow cooker


  • Olive oil spray
  • 6 Roma tomatoes halved with seeds removed
  • 2 red bell peppers halved and seeds removed
  • 1 yellow onion quartered
  • 3 garlic cloves
  • ½ teaspoon salt
  • ¼ teaspoon pepper
  • ½ cup tomato paste
  • 2 cups reduced-sodium vegetable broth
  • 1 tablespoon fresh basil

Serve With:


  • Preheat oven to 350 degrees and spray a rimmed baking sheet with olive oil.
  • Place all vegetables and garlic on the prepared baking sheet. Spray with olive oil, and sprinkle with salt and pepper.
  • Roast in the oven until lightly charred, about 45 minutes.
  • Move the vegetables to the slow cooker. Add in the tomato paste, and vegetable broth. Mix well.
  • Cook on LOW for 6 hours or HIGH for 3 hours.
  • Add the basil, and then use an immersion blender to blend until smooth.
    NOTE: Alternatively, you can let the soup cool, then move to a countertop blender (vent to avoid pressure building) and blend well. Then add back to the slow cooker to reheat.
  • Serve hot. Or move to lunch soup containers and reheat at work tomorrow.


Serving: 1cupCalories: 38kcalCarbohydrates: 8.9gProtein: 1.9gFat: 0.3gSaturated Fat: 0gCholesterol: 0mgSodium: 234mgPotassium: 374mgFiber: 2gSugar: 5.2gCalcium: 19mgIron: 1mg
Keyword Low Calorie Tomato Red Pepper Soup in a Slow Cooker, Miso Soup, slow cooker
Tried this recipe?Let us know how it was!

About the Author

Hi, my name is Audrey Johns and I am a 4 time best selling cookbook author! All 4 of my low calorie cookbooks are published by HarperCollins (the oldest publishing house in the US!) and have been featured on prominent TV shows like The Today Show, Rachael Ray and The Doctors. I am a low calorie and healthy recipe authority and my delicious recipes are tried and loved by thousands of readers. 

After a one year 150 pound weight loss (and I’ve kept it off for 13 years!) I started sharing all of my low calorie recipes with the world. They are always all-natural and geared around weight loss and weight management. I have even made some of these recipes with my Biggest Loser pal Bob Harper! Check out my weight loss story, my best selling cookbooks, and my numerous TV appearances by clicking here.

Nutrition and Calories in Tomato Bell Pepper Soup

Low Sodium Tip: Replace the salt with fresh lemon juice.

Red Bell Pepper Tomato Soup in the Crock Pot

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Red Bell Pepper Tomato Soup in the Crock Pot

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