Ingredients:
1 (16oz.) box spaghetti
1 lb. lean hamburger
1 (30oz.) jar spaghetti sauce
8 oz. cream cheese
8 oz. sour cream
16 oz. shredded Parmesan and Cheddar Cheese

Directions:
Cook spaghetti; drain.  Layer on bottom of casserole dish.  Mix cream cheese and sour cream; layer over spaghetti.  Brown hamburger and simmer with sauce for approximately 20 minutes.  Pour over sour cream mixture.  Top with Parmesan and Cheddar cheese.  Bake at 350 degrees for 30 minutes; covered.  Uncover 10 minutes before done.