Three Cheese Pasta - cooking recipe

Ingredients

8 to 10 dry pasta (macaroni or spirelli)
2 Tbsp. butter or margarine
1/2 c. finely chopped onion
1/2 c. sour cream of plain yogurt
1/2 c. milk
1/2 c. Cheddar cheese
1/2 c. Mozzarella cheese
1/2 c. grated Romano or Parmesan cheese
1 can cream of potato soup (or chicken)
1 lb. spinach fettucine, cooked al dente
1/2 c. milk
5 Tbsp. unsalted butter
1/4 lb. Gorgonzola Blue cheese, crumbled (available in Italian markets and most gourmet grocery stores)
1/4 c. whipping cream
1/4 c. grated Parmesan or Romano cheese

Preparation

While pasta cooks, place milk, butter and crumbled cheese in microwave-safe bowl.
Heat on Full power until cheese and butter are melted, stirring often.
Stir in cream and grated cheese and serve over hot pasta.
Pass additional grated cheese.