I'm not a duck eater (and not sure if it's considered healthy) but, my Mum has makes a cheats version of peking duck. She uses tortilla wraps cut into small squares, fills with crispy shredded duck, diced cucumber, plum sauce (and maybe something else, can't quite remember) and secures with a toothpick. They look cute and people love them ... again, I can't vouch for taste as I don't eat duck
What about little wholemeal or grain dinner rolls (Bakers Delight sell a good size) and fill with shaved roast beef, horseradish cream and water cress (or some type of crunchy lettuce if you can't get water cress).
Same as above with finely chopped chicken, alfalfa and whole egg mayo (all ingredients mixed together)
I've made thai beef cups for a party before. They are so easy. The only fiddly bit is scooping out the cucumber flesh to make the little cups. The rest you can make ahead (I roast a small piece of lean beef but you could just buy it already cooked from a deli). People go mad for them. Here's the recipe I use Cucumber Cups With Thai Beef Salad
So, my suggestion would be to forget catering anything that does involve heating.
Edited by Funnington, 18 November 2012 - 11:31 AM.