Pie, is that cup of coffee a typical breakfast? No appetite at the beginning of the day?
Sounds like you'd end up yo-yo eating, starve then binge.
My wife calls me The Breakfast Bear, and marvels at my enthusiasm for eating, solidly, about sunup. She's not ready for food until maybe midmorning. It's a circadian rhythm thing AFAIK, and cued by light: on a clear dawn, I'm hungry, but it's much less strong on a cloudy morning.
Mr. Breakfast for all kinds and weights of breakfasting, so you can find the kind of breakfast that keeps you not-stupid until lunchtime.