1 lb. hamburger
1/4 c. onion, optional
1 1/2 c. Mozzarella cheese
1/2 c. sour cream
1/3 c. Parmesan cheese
8 oz. can Pillsbury crescent rolls
2 tbsp. butter
1 (15 oz.) jar your favorite spaghetti sauce

Brown hamburger and onion; drain. Add jar of spaghetti sauce. Pour into greased 11x7 inch casserole dish.

In small bowl combine Mozzarella cheese and sour cream. Spread on top or above mixture, then unroll dinner rolls and lay them on top. Melt butter and mix with Parmesan cheese, then brush on top. Bake at 350 degrees for 18-25 minutes until rolls are lightly browned on top.