I make up huge batches of homemade waffles (plain or ones with real blueberries), pancakes (plain, blueberries, applesauce and oatmeal) and even french toast. Cook it all up and freeze for later. Than all I have to do is toss in the toaster or microwave for a few seconds in the morning. I also do huge batches of breakfast burittos-scrambled eggs with cheese, breakfast meat (crumbled up cooked sausage or bacon, even cut up ham lunchmeat), frozen hashbrowns or I dice up my own and fry. Put them together, wrap up in alum foil and freezer. Take out, unwrap from foil, wrap up in a papertowel and microwave until hot. Make muffins ahead of time and freeze them. That is really all I make ahead of time.
Everything else I make doesnt take much time in the mornings. My kids like oatmeal too, we get the instant kind. Scrambled eggs and toast. Hot pockets. Even toast and some fruit or yogurt is a quick healthy breakfast.