I used to cook with a trick invented by an italian woman, called "vasocottura" (then my microwave broke, possibly because of that).

You basically put food in a sealed glass jar, and cook it in the microwave for 6 minutes. The air inside will slip out through the seals, resulting in a near vacuum effect. The food will keep cooking for circa 20 minutes while it cools down. Then you can either warm it up in the microwave until the seal unlocks or put the food in the fridge (depending on the food type it will last from a few days to a few weeks thanks to the vacuuming)

Not every dish comes good (and the vegetables soften considerably), but the flavor is incredible (thanks to the vacuuming) and it takes 20 minutes total without no human handling. You also can batch preparation, while one jar is cooking, you can prepare the following ones, and have up to 10 dishes ready in 1 hour of active work.

Here is a video: https://youtube.com/shorts/ccyOSIvqtgQ?feature=share

Don't try it without further investigation, since not every jar will work without breaking itself or the microwave.