>>13379678I would imagine that something akin to an air fryer in conjunction with defrosting your frozen dish for hours to save energy would be the main method given current technology
If you had mini nukes to have enough power to keep shit ultra deep frozen indefinitely and high powered microwave or convection ovens i don't see it being an issue
If you're dealing with solar powered cookers and refrigeration, or nuke battery tech, you'd have to keep warming or browning to a minimum
More likely, initially it'll be fuck you, put it out to defrost a day in advance and eat it room temp your comfort isn't important
Better get that'll baby nuke tech moving