Using a two-quart saucepan, saute onion in 1/4 C of butter until soft. Mix in flour and gradually blend in broth, wine and cream. Cook with stirring for about 3 minutes after sauce begins to simmer. Stir in 1/4 C of the cheese. Remove from heat and set aside. Melt remaining butter in a large saucepan and saute garlic and shrimp/chicken/turkey until cooked through. Add mushrooms and stir-fry until mushrooms are softened and brown. Combine with onion sauce. Preheat oven to 375 degrees. Cook pasta according to package directions. Toss with shrimp/chicken/turkey and pour into a 9 x 13 baking dish. Sprinkle top with remaining cheese and paprika. Bake 15 minutes. Broil top until lightly browned.