I dont see why that's not do-able, it'd need to be a robust battery pack and an efficient inverter but it would only need to be doing its thing for 2 or 3 minutes at a time.I bought a cold pie the other day from a supermarket. I bought it intending to eat it on my way home,but chickened out,not really fancying a cold steak and Stilton pie. Now if only someone would/could invent a portable,battery operated microwave oven! Nothing like the size we have in our kitchens for obvious reasons,more shoe box(ish) size.
Wouldn't a convection/fan oven be better for a steak&stilton pie though?