Thanks for all your suggestions! (Though some of you are obviously more "high functioning" than I am, when I have morning sickness!)

I hadn't thought of the chicken having gluten - I will have to check with that guest if she will eat them (she's not coeliac, just intolerant, so doesn't have to be 100% GF).

And I like the idea of tacos.

Merigues for dessert sound good. Thanks everybody.