Stack 2 slices of bread and trim the edges neatly. Flatten the bread using a rolling pin.

Mix 2 tbsp canned corn, 1/2 tbsp sugar, mozzarella cheese, and mayonnaise to taste in a bowl.

Place the corn cheese mixture in the center of the bread. Lightly brush water or egg wash on the edges of the bread and seal by pressing with a fork.

Cook the sealed bread on a dry pan over low heat until golden brown on both sides.