Is her usual breakfast toast and an orange or something?
If she wants a toast, she might have to get into a habit of baking flax meal bread (see flax focaccia recipe on the net). I used to bake a pan, then slice and freeze it and toast.
You can take a look at those tapioca/manioc starch breads as well.
Sliced fruit and ham.
Is she Okay with the idea of fish for breakfast? Smoked salmon with cucumbers then.
Overnight baked apples in a small crockpot?
If she is Okay with porriges, she can try sesame seed and almond butter porridge but boy, that would be expensive.
Mashed cauliflower or squash with almond milk can work as a porridge.
I was also going to experiment with banana chips as flakes in a breakfast cerial for my kiddo.
Since white rice is sortta Okay now, maybe rice porridge or pudding with almond milk....