Hi can somebody give me some advice please am going to have a very busy weekend having visitors for dinner?

first of all on sat evening having a small housewarming for about eight,as some of my guests won,t make it until late and will already have eaten can anyone give me any ideas for finger food and recipes if nessacary and secondly am having my iinlaws for dinner on sunday i am going to cook rack of lamb with a garlic and rosemary crust, roasted seasnal veg and baby potatoes. i have no idea what to serve as a starter or dessert or what cheese to put on the chees board please help....