Place veal in a large roaster. Add mushrooms over and around the veal. Add all seasonings and oil, tossing to make sure mushrooms and the surface of the veal are both well-coated. Make sure there are lots of mushrooms on top of the meat, and not just on the sides.

Preheat oven to 300ºF.

Add a little bit of water to the bottom of the pan, just to cover the surface. Cover tightly and bake 3 1/2 to 4 hours. Check the meat after 2 hours, and every so often until ready. When veal is ready, it should have a soft and buttery consistency.