Cut 4 slices of stale Italian bread. Two days old is good so that the bread will not break up when dipped in the milk.
Remove the crust from the bread.
Place one slice of bread on a board, put on top two slices of mozzarella. Better if the mozzarella is dry.
Add two fillet of anchovies and some leaves of rosemary.
Add salt & pepper as desired.
Place another slice of the bread on top so as to make a sandwich and press all together with your hand.
Dip both sides of the sandwich in the milk, then in the flour and lastly in the beaten egg.
Fry until both sides are golden.