Sounds like a difficult situation. At the very least, you can take it as a lesson in what 'not to do'.
Though you feel uncomfortable commenting on the situation, it probably wouldn't hurt or offend if you simply asked her to come check on you one night.. or pop by in the morning to talk with her.
and I sure don't see why you can't communicate about the food at least! Just tell her you feel it's not reheating well and ask her if there's a better way to do it or ask her to reheat one and let you know if SHE feels it's OK to serve.
Sometimes we have to work for people whose standards are very different from ours and just grin and bear it.
Good luck!