2 lb. ground beef
1/4 c. onions, chopped
1 env. spaghetti sauce mix
16 oz. can tomato sauce
1 1/2 c. Mozzarella cheese, grated
1/2 c. sour cream
1 (8 oz.) can refrigerated crescent rolls
2 tbsp. butter, melted
1/3 c. Parmesan cheese

Brown ground beef and onions; drain. Add spaghetti sauce mix and tomato sauce. Simmer gently to let flavors combine. Spread meat mixture into 9x13 inch pan. Spread sour cream over meat mixture, sprinkle on Mozzarella cheese. Top with crescent roll dough. Brush with butter and sprinkle with Parmesan cheese. Bake at 375 degrees for 20-30 minutes.