This is REALLY good. I've made it a few times and one friend requests it whenever he feels the need for comfort food.

 

12 ounces penne
  Salt to taste
4 ounces bacon, chopped
1/4 cup butter
1/2 cup sliced fresh mushrooms
1 cup whipping cream
1/2 cup shredded Swiss cheese
1/2 cup shredded Cheddar cheese
1/4 cup Parmesan cheese
1/8 teaspoon nutmeg
  Salt and pepper to taste
  Grated Parmesan cheese to taste
  Chopped fresh parsley

TO PREPARE:

Cook the pasta in boiling salted water in a saucepan until al dente.  Drain and rinse.  Cover to keep warm.

Sauté the bacon in a nonstick skillet over medium heat until almost crisp.  Transfer the bacon with a slotted spoon to a paper towel to drain.  Reserve 2 Tablespoons of the pan drippings.

Combine the reserved pan drippings and butter in the skillet.  Heat until the butter melts.  Add the mushrooms and bacon.

Sauté for 3 minutes.  Stir in the whipping cream.

Simmer for 3 minutes or until slightly thickened, stirring frequently.

Combine the Swiss cheese, Cheddar cheese and 1/4 cup Parmesan cheese in a bowl and mix well.  Add the cheese mixture 1/4 cup at a time to the cream mixture, stirring constantly after each addition until the cheese melts.  Stir in the nutmeg, salt and pepper.  Add the pasta, tossing to coat.

Spoon into individual pasta bowls.  Sprinkle with Parmesan cheese to taste and parsley.

SERVINGS:  3 - 4