Cut the meat into pieces and beat well on both sides. Onion cut into half rings.
In a bowl, mix the meat with the onion, salt and pepper, add the ketchup and mix thoroughly. Put in the refrigerator overnight (can be longer).
On a baking sheet covered with parchment, put the pieces of meat, and on top of them distribute the onions from the marinade. Bake in a preheated 200 degree oven for 30 minutes. You can cover the top with foil. While the meat is cooking, cut the garlic into thin slices and grate the cheese. Get the meat, distribute the chopped garlic and sprinkle with cheese, send in the oven for another 10 minutes.
Serve the finished meat with herbs and vegetables.Cook to your health!!!