1. Mix the meat, carrot, onion, cream cheese, zucchini, egg, bread crumbs and add the tomato sauce. Form small balls and press them with your palms.
2. Heat the oil in a pan over medium heat. Fry the meatballs
3. Cut the slices of bread with a circular mold.
4. Place the meatballs on 4 slices of bread.
5. Top them with lettuce, tomato and cover the whole with a slice of toast bread.