Preheat oven to 300°F. Butter bottom and sides of 9-inch springform pan. Set aside. Beat cream cheese and Gorgonzola cheese in large mixing bowl until light and fluffy, about 5 minutes. Add eggs one at a time, mixing well after each addition. Mix in 1 cup sour cream. Pour mixture into prepared pan. Bake 60-65 minutes or until toothpick inserted in center comes out clean. Remove from oven; let stand 5 minutes. Carefully spread remaining 1 1/2 cups sour cream over top of cheesecake. Return to oven 5 minutes. Cool completely on wire rack. Refrigerate 12 to 24 hours. To serve, place on serving plate. Carefully remove rim of pan, leaving cake on bottom. Using a pepper mill, grind pepper over top of cake. Chef suggests serving with or on crusty bread.