@rntichauer, I am also in the prediabetic category and have been most of my adult life. Intermittent fasting and sometimes one meal a day has worked really well for me. There's a great discussion on the topic that you might want to read through here where I shared how/why I started with intermittent fasting. I'm now doing mostly 20/4 intermittent fasting with a few 18/6 or 16/8's mixed in when I need to accommodate family or friends outings:

--- Low-carb healthy fat living. Intermittent fasting. What’s your why?:
https://connect.mayoclinic.org/discussion/low-carb-healthy-fat-living-intermittent-fasting-whats-your-why/