Hi Lynne. What size turkey do I need to feed 10 adults? Be sure to tag me@thecookingmomon Instagram. It can be your best friend and a smart assistant if you know your way around quirky recipes. Thanks for visiting. Though salt, pepper, garlic, and onion make the turkey a step above! However, most roaster ovens feature special lids that contain small ridges underneath. -Amy, Hi Judy, var IE = /*@cc_on! Rub the entire bird with olive oil or butter. Place bread cubes in a large bowl. Cover and cook on low for 2 to 3 hours. Roaster Oven ensures an even bake throughout.