Cut each tomato into 4 round slices. Make 8 “sandwiches” using 2 circles of prosciutto and 1 circle of mozzarella between 2 slices of tomato. Dip the sandwiches in flour, then in the beaten eggs, the bread crumbs, then again in the eggs and bread crumbs (double breading). Fry them in plenty of hot oil. Cut them in half, sprinkle with salt and serve immediately.