Wash, clean and cut the tomatoes into large pieces. Peel and roughly dice the onions. Peel garlic and chop finely. Cut cabanossi into thick slices. Drain mozzarella balls. Heat oil in a pan.
Brown the sausage in it and take it out. Add tomatoes, onions and garlic to the frying fat and braise for 6-8 minutes. Season with salt, pepper and oregano. Add cabanossi and mozzarella to the tomatoes. Garnish with oregano. Delicious with baguette bread