I would also like soup. Two, I think, because I like to have a choice. And then I'll choose to have some of each, so make sure there's enough.
One, a chicken stew. Like chicken soup, so easy to digest right after a fast, but with a lot less water. Get rid of the bones, cut the chicken into bite size pieces and add vegetables and starch - chopped carrots, celery, zucchini, and sweet potatoes. No spices, but maybe some herbs like dill or parsley. So it's basically a easy-to-digest meal in one bowl, for those who don't want to stuff themselves right after the fast.
Second soup could be pareve/vegetable. Maybe butternut squash, which is popular. Could be either sweet, like butternut, apple juice, cinnamon, or not sweet, combining the butternut with other vegetables. Anyway, I would blend this one, so it'll be a nice contrast to have one chunky soup and one smooth soup.
Also some kind of carb. Maybe potato knish, or an assortment of knishes.
And something pareve, even though it's a fleishig meal, because some people might prefer that. Maybe a vegetable quiche.
It sounds like this is a walk-around buffet, not a plated sit-down meal, right?