I like the smaller bowl idea - perhaps you could get one of those ones printed with her name or something? I understand very well how she might not be swayed though lol.

Have you tried putting the cereal into a container that has a smaller opening? Like instead of a cereal container with a big opening, try a juice jug that has just a small opening? I find half the cereal wastage is because it pours out faster than they can manage.

My kids do it too. This morning DD2 begged for porridge, then didn't even eat a single spoon of it! Grrrr!