1 lb. ground beef
1 c. Quaker oats
1 (15 1/2 oz.) jar spaghetti sauce
1/2 c. chopped onion
1/3 c. grated Parmesan cheese
1 egg
1 tbsp. Worcestershire sauce
1 tsp. pepper
1/3 c. any of the following sliced mushrooms, sliced ripe olives, shredded
Mozzarella cheese, shredded zucchini
1/2 c. (2 oz.) shredded Mozzarella cheese
Sliced ripe olives (black or green)

Heat oven to 350 degrees. Grease 8 inch baking pan. Combine ground beef, oats, 1/2 cup spaghetti sauce, onion, Parmesan cheese, egg, Worcestershire, and pepper; mix well. Separate mixture into two equal parts. Shape into 2 patties 7 inches in diameter. Place stuffing choices on one patty to within 1/2 inch of edge. Top with other patty. Pinch sides together to enclose stuffing; smooth edges into round loaf. Place into pan. Bake 40 to 45 minutes or until meat is done. Top loaf with 1 cup spaghetti sauce and Mozzarella cheese. Garnish with sliced olives and serve with the remaining sauce. 6 servings.