So my son has been attending a preschool where the teacher can heat his lunch for him. I may be switching him to a different preschool (which is where he will attend elementary school the following year), and they do not heat up lunches.

What cold lunch items have worked well for you? Currently the rotation consists of grilled cheese sandwiches, leftover pizza, pasta, mac and cheese, leftover gyro meat - all of which gets heated.

He is not a huge fan of cold cut sandwiches or pasta salad. Am a little worried about this because he can be a picky eater and is thin enough as is.