I do OMAD with full day fasts Monday-Wednesday-Friday. When I first got started I definitely baked a lot and actually cooked food and sweets on my fasted days - it made no sense to me but preparing food calmed my stress of not having any? I’m not a month into the more strict protocol and I really stopped the behavior.
I think if you find yourself doing it periodically it’s ok but if you start obsession - may be try to do a hobby instead.
This will be very ironic, but I watch competitive eaters shove down humongous amounts of foods to help hunger when I’m fasting. Somehow it works for my brain!
I also definitely fantasize about my planned breakfast and lunch for the next day, and I almost always eat home cooked meals as well.
This probably isn’t healthy at all, but it is what it is for me.