Ingredients: 3 large potatoes Half onion 100 g of grated cheese 100 g of mozzarella 3 eggs Sliced ​​cooked ham Sliced ​​stringy cheeseBlack pepper to taste 

Preparation: 
1. Peel the potatoes and grate them. 
2. Then squeeze them to remove excess water. 
3. Add chopped onion, cheese, egg, salt and pepper. 
4. Pour the mixture into a pan and spread it well. 
5. Bake in the oven at 180° for 30 minutes. 
6. Stuff with ham and cheese and roll up. 
7. Finish cooking at 180° for another 10 minutes.