Fried rice freezes really well. When it's homemade, it becomes a quick, healthy and tasty lunch box option.
Make a big batch, adding a protein of your choice. Next, portion it into clean ziplock bags. Write down the date when you cooked it on the bag, let it cool, then freeze it.
When you need it, just defrost it in the fridge the night before you'll be packing it for your kid's lunch, and heat it up in the morning before placing it in his lunch box.