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Slow Cooker Roasted Tomato Basil Soup

Let the slow cooker work its magic as the ingredients meld together to create a rich and velvety soup. Served with a sprinkle of grated Parmesan and a side of crusty bread, this soup is the epitome of comfort in a bowl.

Tasty Team
94% would make again

Under 30 minutes

Slow Cooker Roasted Tomato Basil Soup

Under 30 minutes


for 8 servings

  • 2 lb tomato (910 g)
  • 1 red bell pepper
  • 1 medium yellow onion
  • 6 cloves garlic
  • ½ cup olive oil (120 mL)
  • kosher salt, to taste
  • pepper, to taste
  • 1 teaspoon dried oregano
  • 1 teaspoon dried thyme
  • 1 teaspoon tomato paste
  • 2 cups vegetable stock (480 mL)
  • ½ cup fresh basil leaves (20 g)

Nutrition Info

  • Calories 76
  • Fat 4g
  • Carbs 10g
  • Fiber 2g
  • Sugar 5g
  • Protein 1g

Estimated values based on one serving size.


  1. Preheat the oven to 425ºF (220ºC).
  2. Trim the stems and cores from the tomatoes, then roughly chop. Remove the seeds and ribs from the bell pepper and slice. Peel and quarter the onion. Smash and peel the garlic cloves. Add everything to a baking sheet and drizzle with the olive oil. Season with salt and pepper.
  3. Roast for 30 minutes, until the vegetables are browned on the edges and fragrant.
  4. Transfer the roasted vegetables to a slow cooker. Add the oregano, thyme, tomato paste, and vegetable stock.
  5. Cover and cook on high for 2 hours.
  6. Using an immersion blender or a standing blender, puree the soup until creamy.
  7. Stack and roll the basil leaves, then thinly slice. Add some to the soup and stir to incorporate.
  8. Ladle the warm soup into bowls and garnish with more basil.
  9. Enjoy!
  10. Don't just wing it -- plan it! Use our meal planner tool in the Tasty app. Download here.
Slow Cooker Roasted Tomato Basil Soup