Get an egg cooker to make some hard boiled eggs. They will last in the fridge at home 5-7 days, and you can throw a few in your lunchbox to eat alongside the thermos soup.

Would poached work?

https://www.amazon.com/dp/B00DDXWFY0/ref=cm_sw_r_cp_api_glt_fabc_QGBRNVF28B5E5SYB5YQE?_encoding=UTF8&psc=1

i bought that too!! its so convenient https://www.amazon.com/gp/product/B00DDXWFY0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1