Pears Fennel and Cream Sauce in Pasta Shells

Name: Pears, Fennel and Cream Sauce in Pasta Shells
Ingredients: 3 Pears, large (I used red skinned) halved, cored and cut into 1/4 inch chunks; 2 Fennel bulbs large, fine chopped; 3 cups Heavy Cream; 1/4 teaspoon cayenne pepper; 3 Garlic Cloves, minced; 1 tablespoon Fresh rosemary, finely chopped; 6 - 8 Bacon, thick-sliced, browned and chopped into small dice; 1/2 cup roasted hazelnuts, chopped into small pieces; 6 ounces Pecarino Romano cheese, grated; Parmesan cheese, grated for topping; 12 Jumbo Pasta Shells for stuffing; Salt and Pepper to taste