How do you reheat rice in a takeout box after you've already made the mistake of refrigerating it straight up?
Assuming it's been kept cold &amp; is therefore 'safe', then just drop it into a larger microwave-safe dish with a not-quite-sealed lid &amp; maybe a tablespoon of cold water.

Once it's halfway heated, you'll be able to break it up a bit to stir. When fully heated, it will break up with a fork. Your family will never know ;)