Baked Ziti....
Source: Jennifer Valentino-McCarthy

16 oz. ziti
1/2 lb. hamburger
1/2 lb. ground sausage
1 onion, chopped
2 26 oz. jars spaghetti sauce
6 oz. sliced provolone cheese
6 oz. sliced mozzarella cheese
1 1/2 C sour cream
1/2 C parmesean cheese
1/4 C fresh basil, chopped

Mix meats well and brown.
Add onion.
Add spaghetti sauce and simmer for 15 minutes.
Mix in sour cream.
Cook pasta (~8 minutes...al dente)
Preheat oven to 350 °F.
In a lightly greased 13X9 baking dish:
   Place 1/2 the pasta.
   Layer the provolone and mozzarella cheese.
   Cover with 1/2 the spaghetti sauce.
   Repeat: pasta, cheeses, sauce. Top with parmesean cheese
   and basil.
Bake at 350 Preheat oven to 350 °F. for 30 minutes.

Serve with a green vegetable.
Toasted garlic bread would be good.  

Conservatively, 8 servings.