I think Oberlander’s rainbow cake and sandwich cookies with chocolate/jam are to die for. Because the cookies are made with nut flour, I’d even eat them during the year and I sometimes do.
I enjoy macaroons, especially chocolate chip macaroons, dipped in chocolate. I have them during the year sometimes, also.
For nosh, I like frying plantains and different exotic root vegetables. It is also really nice to take tapioca flour and make popovers with eggs, pepper, salt, cheese and herbs and butter with them (you make it like a pate choux).
I’ve seen Gefen tapioca flour. These popovers are apparently really popular in Brazil, where they call them pan de quecao.
Another idea is crudites with homemade mayonnaise (someone posted something about that not long ago) that is basically a base for making any kind of dip (olive, pepper, dill, baba, etc.)