You bake this as a cake, then cool and cut into wedges that hold up beautifully packed into a lunch box for something that is dessert-like but wholly nutritious.
The individual wedges freeze well, wrapped tightly in plastic wrap and then packed into a heavy-gauge zip-style bag. Pull them out one at a time and pack into a lunch box, still frozen. They will defrost perfectly.
Separate the eggs while still cold, placing both and whites in a medium-sized bowls. Cover each tightly with plastic wrap while they warm to room temperature. You can use gluten free flour too.