
Start by placing the ground beef on an oven rack.
Then, spread the meat out until it is shaped into a rectangle and make vertical indentations, creating sections
Place the buffalo mozzarella cheese cut into smaller pieces in these sections and cover everything with +1kg of ground beef.
Place it in the freezer and let it chill for 1 hour.
In a medium bowl, add the finely diced tomatoes, the mayonnaise, the grated mozzarella cheese and the mushrooms chopped into smaller pieces.
Season with the salt, a pinch of black pepper and mix everything very well until fully combined.
In a large baking tray, add the onion cut into strips, the sliced potato, the mixture we prepared and spread it.
Add the meat we froze.
Season with a pinch of salt and a pinch of black pepper.
Sprinkle the grated mozzarella cheese on top.
Place in a preheated oven at 180° C (350° F) and bake for 40 minutes.
Serve.