1 1/2 lb. ground beef
1 c. bread crumbs
1 egg
1 (16 oz.) can tomato sauce
1 tbsp. oregano
Salt and pepper to taste
1/2 c. finely chopped onions (optional)
1/2 c. finely chopped peppers (optional)
1/2 c. finely chopped mushrooms (optional)
2 c. grated Mozzarella cheese

Preheat oven to 375 degrees. Mix all ingredients except Mozzarella cheese. Flatten mixture to thick oval on wax paper. Sprinkle Mozzarella cheese on top and roll up jelly roll style. Pinch ends closed to keep in cheese. Put diagonally in 8x8 inch pan and bake uncovered for 1 1/4 to 1 1/2 hours.