Baked Spaghetti Recipe with tomatoes

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 tablespoon butter 1 can 28-oz diced tomatoes undrained 1 can (4oz) mushroom stems and pieces, drained 1 can[...]