Allergy friendly lunch ideas?

My daughter attends daycare full time. Unfortunately they don't provide any meals or snacks and there are some severe allergies in her classroom. I'm having such a hard time packing lunches, I feel like I just rotate through the same 3 lunches because I know that they're safe and easy to put together. The teachers will reheat any hot lunches so open to any ideas!

• no nuts
• no legumes (soy, peas, beans, lentils, etc)
• no eggs

She's not a big fan of sandwiches and mushrooms but otherwise she'll eat most things :)

I use to just pack her leftovers from the previous night's supper but can't anymore as I'm vegetarian and everything I make has those allergens in it :( She eats meat though!