Preheat oven to 160 ° C.
Heat the pan over medium heat. Add oil and fry the meat on all sides for about 10 minutes.
Put onion, garlic and 1 bay leaf on the bottom of the baking dish. Put meat on top, the remaining bay leaf, add salt and pepper and cover with foil.
Bake in the oven for about 30 minutes. Reduce heat to 150 C and bake for 1 hour.
Put the prepared meat on a dish, cover with foil and let stand for 10 - 15 minutes. Cut into slices, lay the onion on top and pour over the juice.