i have the same problem, i am so fussy that i struggle to find things to eat.
you can buy packets of seaweed, cook some rice and eat with tuna and mayo, pretty yummy, even chuck cooked or raw mushrooms in it, avocado, very healthy and filling lunch, especially yummy if you drink it with green tea!!
Or roasted eggplant with natural yoghurt in a roll is actually really delicious.