in my son's nursery, they don't use microwave either, but they heat food (using hot water). they told me that this is part of their safety regulations.
Anyhow, I give my son:
- kiwi, apple, banana...
-yogurt
- cucumber, tomato (chopped)
-bread and cheese (for sandwich)
- boiled egg
- rice and stew (they heat it)
-biscuits / crackers
-juice

I hope I helped