Believe it or not, this happens. Beside gluten-free toast which has become popular since Michael has learned to make it himself, the most requested breakfast food is muffins. I try to sneak a little nutrition in by making a variety of fruit muffins, carrot muffins, etc. Gluten-free muffins tend to become dry quickly, but are quite edible if warmed in the microwave and served with melted butter. For those hectic mornings, try a quick dish of yogurt and some fruit.
Bananas are easy and, if necessary, can be eaten in the car or on the bus with little mess.
Or, try cheese and gluten-free crackers, or, Michael's preference, Cheese Whiz on a rice cake. Finally, if you really want to get revenge on your child's teacher, give your little Celiac a sugar boost with a gluten-free doughnut. The Gluten-Free Anytime book has a good recipe for doughnuts as well. I tried to reduce Michael's morning sugar intake by making doughnut 'holes' instead of 'real doughnuts'. In a small bowl beat eggs with granulated sugar.