Situations like that are so awkward! I'm somewhat accustomed to them as a southern vegetarian (we made this green bean casserole just for you - it's cooked in bacon fat but we made sure that there weren't any pieces of meat in it!), but it's still hard to navigate because on the one hand I don't really want to put hummus in my body, nor am I particularly fond of cherry tomatoes or raw baby carrots as a main course, but I feel obligated to show my appreciation of their efforts by eating some of it. At the same time, if I eat it, then I'm feeding their illusions that they understand what my lifestyle - and good health - is about, so the conscientious objector in me is in constant conflict with the southern lady in me over how to respond. Usually I end up taking a plate but not actually eating anything I put on it. Then if anyone notices I'm not actually eating they'll get the spiel.