Baked Spaghetti Casserole without milk

2 cups canned diced tomatoes 2 cups tomato sauce 1/2 cup diced onion 1/2 cup diced green bell pepper (we used red) 2 cloves garlic , chopped 1/4 cup chopped[...]

1 cup chopped onion 1 cup chopped green pepper 1 lb hamburger 1 tablespoon margarine 1 (28 ounce) can tomatoes , with liquid 1 (4 ounce) can mushroom pieces ,[...]