My mother in law keeps stealing food from my refrigerator when I'm not home.

My mother in law and I have come to some kind of agreement. She will not eat anything other than what I have prepared for her. This is all fine and dandy when I'm home, but when I'm at work, she is free to do whatever she wants. She will open up my refrigerator and eat all of my prepped lunches and snacks that I have prepared for myself. This has happened multiple times before, and I've lost count of how much of my food she has consumed. <br><br>I've tried many things to get her to stop. I've labeled all of my food with my name on it. I've also put all of my lunches in the freezer, and frozen my snacks to throw her off. None of this has worked. <br><br>I'm trying to get this issue resolved as soon as possible. Any suggestions?<br><br>tl,dr: My mother in law keeps stealing my food whenever I leave the house.