I couldn't find a post on this technique on here so i might as well post it myself.
This is a technique to velvet your chicken breast and basically make it more moist and tender.
I've been using this in my meal prep for about a year now and it definitely has made it easier to eat loads of chicken breast.

This link should pretty much explain everything: https://www.kikkoman.co.uk/inspiration/a-guide-to-the-velveting-technique/

I use Shaoxing wine instead of sesame oil, you should be able to find this at any asian supermarket.
It might also be a bit of trial and error getting the ratios perfect for meal prep because the microwave tends to make the chicken a bit too wet if you overdo it.