PREPARE penne according to package instructions.

COOK bacon in a large skillet over medium heat until crisp; REMOVE bacon, reserving two tablespoons drippings in skillet.

CRUMBLE bacon; SET aside.

SAUTE sliced mushrooms and garlic in reserved drippings, three minutes or until tender.

STIR in cooked penne, Parmesan cheese, whipping cream and pepper.

SIMMER over medium-low heat, STIRRING often, until sauce is thickened.

STIR in crumbled bacon and sliced green onions.