Bring A Large Pot Of Lightly Salted Water To A Boil. Add Pasta And Cook For 8 To 10 Minutes Or Until Al Dente; Drain. Meanwhile, Spray Cooking Oil In A Large Skillet And Saute Red Bell Peppers, Garlic And Cayenne Pepper Over Medium Heat For 3 To 5 Minutes. Stir In Sour Cream And Broth; Simmer Uncovered For 5 Minutes. Remove From Heat And Stir In Cheese. Toss Hot Pasta With Sauce And Season With Salt And Pepper To Taste; Serve.