One of my absolute favorite “party foods” are potstickers, also known as gyoza or pork dumplings. These little snacks cook quickly, are a breeze to prepare, and are consumed like candy.
I suggest using a sheet pan to store the dumplings and a non-stick frying pan with a tight fitting lid for cooking. You can prepare a batch of dumplings ahead of time and cook them to order — and you really should, because these are best consumed right off the stove (and they usually don’t stay on a serving plate too long because they’re too tasty!).