Can she do Ling-Ling potstickers? Those have good availability-- come in a resealable bag-- and are okay for both pn/tn/egg allergy. Not sure about milk, and they do contain soy, wheat, and sesame. I eat them though and I have a sfa.
They're not bad nutritionally, and might be something she could pick up when her freezer runs a bit low, or when she wants some variety.
If she isn't egg allergic, mini-quiches (done in jumbo muffin tins) are an option.