Place the tenderloin, bacon side up, in a shallow roasting pan. Insert meat thermometer into meat, not stuffing. Let stand for 10 minutes. Remove toothpicks and slice. Serve on a warm platter.
Preparation time is virtually non-existent and the results are truly amazing.
Place the orange in the body cavity of the chicken. Place the chicken in a roasting pan and brush with the melted butter or olive oil. Sprinkle fresh rosemary on the chicken. Bake in 350 oven for 1 to 2 hours, or until the leg joints move easily, basting regularly with the pan drippings. Makes 6-8 servings.