I eat one meal a day for as far as I can remember. Fatties love to tell me it's unhealthy, my doctor hasn't figure out yet though so I imagine it really isn't that unhealthy.
Eating three meals a day is a very very very recent thing if you account for human history, or even modern human history
You need to include more info about your one meal, height and your actual weight. If your 5'2 this is alot less interesting