This recipe came from my Aunt Mildred.
1-1/2 - 2 lb Italian sausage
1 can tomato sauce
1 can mushrooms
1-2 green peppers, sliced
Preheat oven to 350°F. Put Italian sausage in oven to brown for 1/2 hour. Add tomato sauce, mushrooms and green pepper and bake another hour.
I often replace the tomato sauce with spaghetti sauce and the canned mushrooms with fresh ones.