im not a coeliac but ive loads of food intollerances such as wheat,gluten,yeast etc...
i think you'll find that your friend will still be able to eat meat,potatoes,veg and rice.you can also buy free from pasta(which is normally made of corn)from most supermarkets aswell as dairy free ice-cream also.
you could have a nice stir fry with rice or even a roast dinner as a main course,then meringue,ice cream and fruit for dessert-yum!
hope this helps-if not post your question on the allergies section and you'll probably get a good response
Dh has recently been diagnosed as coeliac: coeliacs aren't dairy-free usually AFAIK. Risottos are good, so is curry and rice, for us. Dairy-free makes dessert a bit more of a challenge! Dh now eats loads of fruit - could you get some exotic ones and do an exciting platter - starfruit, pawpaw, strawberries etc?