1 lb. ground beef, browned
1 jar marinara sauce
18 oz. ravioli, cooked and drained (I used 4-cheese today, but I usually buy spinach and cheese to sneak more nutrients in!)
1 1/2 c. mozzarella cheese, shredded
4 T. Parmesan cheese, shredded
Mix meat and sauce in large bowl. Add pasta and 1 cup mozzarella. Mix. Spoon into casserole dish. Top with remaining mozzarella and Parmesan. Bake at 375 degrees for 20 minutes or until bubbly.