Fennel, Kale, and Sausage Rigatoni with Cream Sauce

Fennel, Kale, and Sausage Rigatoni with Cream Sauce   Ingredients 1lb rigatoni 1 medium onion sliced thin 1 bulb of fennel sliced thin 1 lb italian sweet sausage salt pepper crushed red pepper 3 tablespoons olive oil 3 cup of…