Hi Frances,
Oh, you are in for a special treat! There's nothing quite like watching Tinker Bell fly overhead as you dine on sumptuous desserts. The food and fireworks will certainly make for a magical evening.
I think you'll be really impressed with the wide range of desserts available at the
Tomorrowland Terrace Fireworks Dessert Party. In addition to the amazing baked goods at this event, you'll also find some lovely vegan options. I could make a meal of the amazing fruit alone! Check out the independent fan sites, www.allears.net and www.disneyfoodblog.com for extensive photos of this exciting event.
I'm glad to hear that you have already reached out to Disney about the food allergies in your traveling party. If you don't hear back from them promptly, I heartily encourage you to call (407) WDW-DINE. Have your dining confirmation number in hand and ask them to make note of the relevant allergies on your reservation. I've heard many guests say that no one handles food allergies better than Disney! I'm sure they'll have many wonderful vegan options when you arrive for the dessert party. Be sure to remind the Cast Members at the party regarding your allergies when you arrive and they will be happy to point out the dessert options that best fit your needs.
Best wishes for a vacation sprinkled with extra pixie dust!
Jill