Boil the pasta, drain and put in a greased baking dish. Dice the onions and peppers and fry them in the pan with the mushrooms. Add the pizza and tomato pieces to the boil and season with salt, pepper, oregano and garlic.
Pour the mixture over the pasta. Then put the cheese on top and bake it in the oven at 200 degrees top / bottom heat for about 20-25 minutes, until the cheese runs well and is a bit brown.