Have you observed this phenomenon in yourself, and have you tested to see that it is really occurring? I've read about this "breakfast to stop dawn phenomenon" theory, but I've never observed it in myself. I sometimes see my BG rise when I wake up (which some might describe as dawn phenomenon), but for me it seems to happen if I have eaten food (especially fat like peanuts) late the night before (something I know I shouldn't do but life happens). Digestion slows dramatically while sleeping, so if you eat late at night you will have undigested food when you wake up (especially fat which is digested slowly anyway).
I haven't seen any correlation with preventing the rise based on whether or not I eat breakfast nor what type of breakfast I eat. If anything, eating breakfast will just increase my BG more, so instead I just bolus as needed to correct on the rare mornings when I observe this rise and eat my small daily breakfast as normal.
Maybe this isn't "dawn phenomenon", but it is the closest thing I've personally observed.