(for outdoor camping)
Mix the flour and water to a nice firm dough. With a little flour on a board, roll out enough dough to cover the dish you are using for the base of the pizza. Then roll enough dough to go around the edge of the dish. This is to keep the mixture in and should be about 1/2 inch high.
Now place the base of the pizza in a pre-heated camp oven. Set the camp oven on a shovel of hot coals then cover the lid with very hot coals.
After about 8 to 10 minutes, check to see if the base is cooked. It will vary with the heat of the coals. When base is cooked, remove from camp oven and place baked beans on the base first. Then place cheese, bacon, finishing off with the mushrooms.
Return to hot camp oven with plenty of hot coals on top of the lid. Leave until bacon and mushrooms are cooked. Be very careful not to burn yourself when removing the pizza from the camp oven.