SAUCE:

1/2 c. melted butter
1/2 c. half and half
1 (6 1/2 oz.) can chopped clams
Flour
Salt and pepper

Prepare tortellini according to package directions. Combine butter and half and half in a saucepan over medium/low heat. Add flour to thicken, stirring constantly. Add the clams with juice and season to taste. Pour over cooked tortellini and top with Parmesan cheese.