One meal a day. The variation I do, I usually only eat one meal, except on lift days where I eat carbs and protein half hour before and right after the lift, usually followed by the rest of my food when I get home. I haven't done it long enough to swear by it, but I have done OMAD and 5-8 hour eating windows for about a year and have seen results. Look up research on fasting in general.
Side Bar:
There have been studies done on patients who have fasted for 3 days prior to kemotherapy exhibited far less negative side effects than a non fasting control group.