Meal prep involves BULK. Lots of stuff. I cooked an entire giant punnet of sliced mushrooms to accent my meals and this is another accent for flavour and texture.
There was so much stuff to do that I had to draft @triddin to do some of the cooking for me, and this is the one that he helped with.
This removes some bitterness from the eggplant. I was told once that they could be toxic if you don't do this, but I later learned that some people like those bitter bitter eggplants and just cook them without soaking.
These also have the potential to get monotonous en masse, so use for augmenting meals rather than a staple.