Thaw frozen bread. Grease cookie sheet. Brown ground beef and drain. Roll out bread to 1/2 inch thick. Lay on cookie sheet. On one half of the bread, in order, place 2/3 cup spaghetti sauce, 1/2 cup cheese, drained ground beef, pepperoni, chopped onions, green peppers, mushrooms. Add the remaining 1/2 cup of cheese and 1/3 cup spaghetti sauce.
Take the other half of rolled bread and pull over the ingredients to form a pocket and pinch all edges together tightly. Preheat oven to 400 degrees and bake for 45 minutes or until done. (Ingredients are optional.) Heat the remaining spaghetti sauce and pour on top of calzone before serving.
