Drain the mozzarella thoroughly and cut into small cubes. Wash the peppers, cut them in half and remove the cores and the white dividers. Cut the halves into small cubes. Wash and finely chop the basil and mint. Mix all of these ingredients in a bowl.
Mix the vinegar with salt and pepper, gradually beat in the oil. Also add the marinade to the bowl and mix everything carefully. Serve the salad as soon as possible.
TIP: This salad tastes particularly good with the fine buffalo milk mozzarella.