I have the same problem most mornings Ive decided to put my foot down and tried to introduce a normal healthy breakfast (not a 3 course meal!) so DS has rice bubbles I have toast and a coffee and DF has toast or leftovers from the night before.
Saturdays are usually eggs benny with a light lunch and something easy like nachos for dinner. Hes slowly getting use to the new morning routine but its hard to teach old dogs new tricks huh..