heck - if he'll eat a frozen dinner - why not? it's still food? you don't have to have "Breakfast food" at breakfast.
how old is he?
Here are a few of my favorite breakfasts (quick too)
peanut butter sandwhich (GREAT - filled with protein and keeps me going all morning) even PBJ
small tortilla smeared with PB, with cereal (cheerios/honey nut cheerios) sprinkled on, then rolled up
yogurt
cereal bars (the nutragrain type)
milk and cereal bars (yeah, full of sugar, but filling - I like the honey nut cheerios one, DH likes the Cocoa Puff one! heheh)