Beef and Cheese Manicotti

1, 8 oz package manicotti
1/2 lb lean ground beef
1/2 c finely chopped onion
2 cloves garlic, minced
1, 15 oz container fat free ricotta cheese
1 c shredded mozzarella cheese, divided
1 egg white
2 T finely chopped parsley
1/2 tsp kosher salt
1/2 tsp pepper
1 1/2 c marinara sauce

Cook manicotti according to package directions. Drain and set aside. Cook ground beef, onion and garlic until meat is browned; drain and let cool slightly. Combine ricotta cheese, 1/2 c mozzarella cheese and next 4 ingredients in a large mixing bowl. Stir in the meat mixture and set aside. Preheat oven to 350 degrees. Spoon 1/2 c marinara sauce in a lightly greased 9X13 inch baking dish. Fill manicotti shells with the meat mixture and arrange in a single layer in prepared dish. Spoon the remaining sauce over the top and sprinkle with remaining mozzarella cheese. Bake 30 minutes or until sauce bubbles and is heated through. Let stand 5 min before serving.