Is it better for someone w/pre-diabetes to eat small quantities of food often, or 2 large meals? goal is to control blood sugar levels.

Eat all in 8 hours: More important than how many meals you eat is if you can eat all your meals within an 8 hour period and fast for 16 hours; doing this even a few days a week will help. Also, what you eat is much more important than the number of meals- it is crucial to eat a low-glycemic diet. See https://authoritynutrition.com/intermittent-fasting-guide/ and http://tinyurl.com/j6t4rlh for great advice.