If you are on your own, my assumption is you'd eat out a lot and in Dubai you can do this on the cheap...or not!! A shawarma will set you back about AED3. Supermarkets like Union Coop sell shawarma and pre-made dips, salads etc and you can choose meats ie lamb chops, marinated kebabs and they bbq them for you. Spinney's supermarkets have nice cookies and cakes and you can get fried rice, veg and dishes from them as does Carrefour. Nearly every place delivers-KFC, Pizza Hut, Hardees, Burger King etc and the restaurants like Eat and Drink which has Chinese and Arabic food and there are loads of other restaurants like Kitchen (Indian), Zaatar (spelling??Lebanese) they deliver. All major malls have food courts too.
Cooking wise you can buy easy to cook stuff like sausages, burgers, chicken kievs, schnitzels, chops, steaks and great fish-some stuff is marinated and quality etc varies from store to store.
Breads are great-heaps of Arabic bread but the best loaf bread and best bakery in a Sspermarket comes from Park 'n Shop in my opinion. They had great mince pies at Christmas. Speaking of which your turkey for Chrissy can even be cooked with all the trimmings and delivered to you ready for Christmas lunch.
Life can be one big smorgasboard in Dubai!!