Shrimp with romesco sauce (using gluten-free bread) would be good.
You may want to look through the contest submissions for a few of the contests to see if anything is applicable:
http://www.food52.com/contests...
http://www.food52.com/contests...
http://www.food52.com/contests...
http://www.food52.com/contests...

Oh you could do button mushrooms stuffed with ricotta, sundried tomatoes, and garlic. Of course there are various items you can create with the stuffing, but non the less easy to do and can easily be kept warm in the proper warming dish;)

If you own a mini muffin pan - mini crustless quiches. Fill them with appropriate veggies and cheeses, like spinach greyre, manchago red pepper, etc. easy & tasty.

Retro but still delicious: deviled eggs, rumaki, bacon-wrapped shrimp with bbq sauce.

second Midge's idea on the rumaki---I made a "mock rumaki" for my holiday appetizer class. We used cooked, boneless chicken thigh pieces in place of the chicken livers. Be sure to pre-cook the bacon part way before wrapping them--that is the secret to getting a nice crispy piece of bacon. For a dipping sauce, can she use orange marmalade in place of the honey type of sweet n sour sauces? You can spice it up with some red pepper flakes.