I did both a Microwave and a Toaster Oven. I used a Honda 2000 generator and could only have one of them ON at a time.
Showing the tambor door.
Fully open.
Door open.
We could do everything that can be done at home in the kitchen; cookies, baked potatoes, muffins, bread, prime rib roasts, everything.
The generator would be at higher rpm's until the oven arrived at the desired temperature, then would go to idle and only come back up in rpms when it needed to keep the desired temperature. And, we could turn off the generator after about 80% of the cooking time and the heat inside the toaster oven would do the "carry over" thing. This specific toaster oven was remarkably cool to the touch on the outside, not all toaster ovens are that way.
I've since re-done the interior and eliminated the microwave and the toaster oven as we no longer camp with the Honda 2000 generator. Sort of miss the oven, but not the microwave or the generator.
The next camper may have a propane stove top with a propane oven right below, like in a class "C" RV.