Vegetable tray? They have them premade in the delis now, for around $10 or under. they're fine unrefrigerated for a short time, just keep the cover on till you serve.
A cheese ball with crackers instead of sliced cheese? Most are meant to be served room temp, and the covering of nuts or seeds or whatever help them to keep from getting funky. I have a good, simple garlic cheese ball recipe if you'd like.
Mini-loaves of nut/fruit breads? You can make one non-sugary (can she have fruit? Make banana nut bread)
An antipasto tray of olives, mini-pickles, salami slices and so forth? Savory, not sweet, and the items are preserved, so room temp shouldn't be a problem.
My brain's a little fuzzy at this hour, but that's what I can come up with so far. I'll post more later if I think of something else. (Can you tell I used to do a *lot* of entertaining?)