Well, let me be blunt. Cooking is pretty much something you have to do. Frozen dinners have lots of bad **** in them, so it would be rather masochistic to go that route (some of them can contribute to your mood disorder). So this route would be sefl-punishment, rather than treating yourself right.

Just start cooking again. Cooking doesn't really have anything to do with your husband, does it, if you look at it logicaly. First cook something you like but your husband didn't. Maybe try new things.