Banana pancakes are great as a treat.

Flour, milk, egg (we don't eat egg so leave that out), a banana and a bit of honey.

DS loves them.

We usually have weetbix our fruit toast.

Creamy rice- rice cooked in half water /half milk, with honey and cinnamon for flavour.
Muesli with strawberries, honey and greek yogurt.

Alternatively, you could just cook up some veges. Who says breakfast has to be cereal/ egg? In india they have rice.