Our Bounder has a convection microwave. If boondocking/dry camping and I MUST reheat frozen lasagna, I use the roast setting, which uses both microwave and convection oven heating. After twenty minutes, it is no longer frozen so I switch it to bake for another 15-20 minutes. Yes, I must run the generator, but if I am cooking frozen lasagna, chances are it is cold and rainy outside and my batteries need a boost anyway.
(Disclaimer: we have propane and 600W of solar. Generator use is directly related to the weather.)
