I have used an electric roaster for years to cook a turkey. Usually 20-23 pounds, so it requires me to oil the turkey and cover it with foil and then put the top on. The top of the roaster doesn't sit flush, as probably the one I have is made for 15 pound birds. I put the bird on a rack and then on a couple of stalks of celery so it doesn't stick to the pan, maybe I'll add liquid and then let it go! Frees up the oven to cook all the other things I want to cook, including stuffing. I also mash the potatoes early on and put them in a crockpot- on low/warm. Need to watch them so they don't get too starchy from overcooking. I have most of the mess cleaned up before dinner is served- buffet style...got it down to a science.