I made a batch of steamed beef dumplings and put them in the freezer for a party I'm hosting next week. I have read online that it's best to reheat them in a steamer or in a pan (as pot-stickers), but I don't want to be standing over them when I have guests around. I know it might not be ideal, but if I wanted to reheat them in the microwave or the oven, how should I do it? Thaw them first and then heat, or heat directly from the freezer? At what temperature and how long in the oven? Or for how long in the microwave?