Meatball Casserole Prep Time: 15 minutes Cook Time: 35 minutes Servings: 4 Share: PRINT EMAIL PDF Pinterest This Recipe Calls For Old World Style® Sauces Traditional Sauce Shop Now Ingredients 1/2 small white onion 2 cloves garlic 2 Tbsp. olive oil 1 lb. lean ground beef 1 egg 2 Tbsp. grated Parmesan cheese 1 Tbsp. Dijon mustard 1 1/2 Tbsp. dried parsley, crushed 1 1/2 tsp. dried oregano leaves 1/4 tsp. salt 1/8 tsp. ground black pepper 1 jar RAGÚ® Old World Style® Traditional Sauce 2 cups shredded part-skim Mozzarella cheese, (about 8 oz.) Get Ingredients Instructions Preheat oven to 350°F. Process onion and garlic in food processor until finely chopped. Heat olive oil in 8-inch skillet over medium heat and cook onion mixture, stirring occasionally, 5 minutes or until onion is translucent. Remove from heat and let cool completely. Combine onion mixture with remaining ingredients except Mozzarella cheese and sauce in large bowl; shape into 20 (2-in.) meatballs. Arrange meatballs in 13 x 9-inch baking dish. Bake 25 minutes; pour sauce over meatballs, then sprinkle with cheese. Bake an additional 10 minutes or until meatballs are thoroughly cooked. Remove from oven and let stand 5 minutes before serving