How to cook a Turkey Crown. From what size turkey crown to buy, how many people it serves, how long to defrost, preparing to roast, adding flavour, what temperature and how long to cook. As well as basting advice, internal temperature, resting time, how to carve bone-in Turkey Breast and finally how to create turkey gravy from the leftover stock and drippings. Tender slices of roast turkey for your Christmas Roast Dinner or Thanksgiving meal.