How to make pre-baked pita bread
I normally make a full batch of pitta, freeze most of it and then defrost using the toaster.
Contrary to Joshua Engel's answer, I've never had any trouble with the pitta toasting rather than defrosting; for contexts where I want pitta I'm happy for it to be hot. My toaster has a 'defrost' setting which I think reduces the heat intensity, and I'll typically set it at the shortest setting, then turn the pitta over to heat the part that was sticking out of the top of the toaster. I also sometimes leave it in the oven for a few minutes to defrost instead but have never felt a need to wrap it in foil beforehand, and I don't think it's suffered as a result.