Prepare Dough: Boil water, add mayonnaise, then gradually incorporate flour to form a smooth dough. Let cool.
Prepare Filling: Mash boiled potatoes with salt and butter. Stir in grated mozzarella cheese.
Shape Dough Balls: Divide cooled dough into 16 pieces. Shape each piece into a ball.
Stuff Dough Balls: Flatten each dough ball, add a teaspoon of filling, seal, and reshape.
Fry Dough Balls: Heat oil in a skillet. Fry stuffed dough balls until golden brown and crispy. Drain on paper towels.
Serve: Serve hot with your preferred dip.
Enjoy this innovative and delicious snack!