For reheating stuffing in the oven, how long would you bake it and at what temperature?
I'd reheat it at 375 again, covered, and add maybe 1/2 cup liquid to start. It will probably take about 30-40 minutes to come back to temperature. If you have an instant-read thermometer, it is at a servable temperature at 160, though you may want to go a fair amount higher if it will sit long before being eaten.