Bring A Large Pot Of Lightly Salted Water To A Rolling Boil. Cook The Penne In The Boiling Water, Stirring Occasionally, Until Tender Yet Firm To The Bite, About 11 Minutes; Drain. Return The Drained Pasta To The Pot; Stir The Butter, Parmesan Cheese, And Gorgonzola Cheese Into The Pasta And Place Over Medium Heat; Cook Until The Cheese Is Completely Melted. Pour The Cream Into The Pasta Mixture; Stir. Remove From Heat And Fold The Pear Into The Pasta Mixture. Top With Walnuts. Season With Pepper To Serve.