1 lb. ground beef
1 (approx. 28-32 oz.) jar Ragu sauce
1 lb. shell macaroni
1/2 pt. sour cream
8 oz. shredded Provolone cheese
8 oz. shredded Mozzarella cheese
1/2 tsp. salt
1/4 tsp. pepper

Cook shells. Brown ground beef; add salt and pepper. Stir in Ragu and simmer 20 minutes. Layer in 9" x 13" pan 1/2 of shells, 1/2 of meat sauce, 1/2 of sour cream, 1/2 of both cheeses. Repeat. Cover pan; bake 350 degrees for 40 minutes. Uncover and bake an additional 20 minutes.