I have a medium sized full turkey butterfly - (5kgs) - and I need to cook it together with potatoes and veg and other items for 28 people. The problem is i have only a small cooking area and limited availability to the ovens! is the folowing possible and safe? To place the turkey in an aluminium roasting pan with a little water and cover completely with foil. Cook slowly for 3 hours or so on about 150C the night before I need it. Keep the bird covered and allow to cool naturally but NOT refrigerate. The next day put the bird back in a pre-heated oven (still foil covered) at 200C for another hour. then remove the foil and cook for a further 30 mins to colour and brown the top etc. Any advice most welcome please.