Clean, wash and peel the peppers as desired. Peel and dice the onion, press the garlic. Cut the peppers into pieces.
Heat the oil in a saucepan, add the onion and garlic and sauté briefly. Then add the peppers and sweat for 2-3 minutes while stirring. Add the peeled tomatoes and roughly chop with the wooden spoon. Then pour in the broth, bring the soup to a boil, then reduce the heat and let everything simmer gently for about 20-25 minutes.
At the end of the cooking time, puree the soup with the hand blender and season with salt and pepper.
Fresh basil and mozzarella balls are a delicious addition to this soup.