For Christmas, I got mom a NuWave Mini Oven. This is s smaller version of the oven she saw used by Mike and Diane Kelly at Thanksgiving. She has replaced the larger toaster oven that she used to have on board and has told me that so far this works great. It even makes toast.
It has a smaller footprint that the toaster oven. And it also doesn't leak as much heat. So it seems to be perfectly safe to use on board.
Merry Xmas mom! Enjoy.