I have a 9lb turkey breast to bake. I've learned that I want the internal temp to register between 155-165 on an instant-read thermometer inserted into the deepest part of the breast when it's done. Anyone know approximately how long that might take and what the best temp is? I've read about people baking turkey breast anywhere from 325F to 425F and can only imagine that much variability in baking temp would certainly affect the cooking time. Thanks!