I tested a lot of recipes using the deep fryer. I froze samples of these foods. The fish and chicken reheated in the oven very well. I tried the mushrooms today - just gave them a quick blitz in the microwave. They were surprisingly good, so this is another way to add convenience to your catering. I expect they would have been crisper in the oven, but the garlicky succulence of the mushroom was very good.
Served them with giant Greek beans, salad and some excellent red pepper sauce, again from the freezer.