I use a pressure cooker and cook nice dishes on propane like a pork roast with rice. Usually there is enough for 6 meals in there so I put the leftovers in the fridge, this is where the $50 600 watt microwave comes in, reheating on a paper plate, no mess, no dishes, no fuss! I love cooking fresh, but reheating almost everything is easier and faster in a microwave. Plus once you have the microwave, free electricity vs purchasing propane, I say it is cheap rv living.
Add: I totally forgot, I recently got a small portable induction cook top, during the day I use that instead of propane stove, more free heating. Once you get your rig set up nice, it all gets cheaper.