pottery pie plate uses (402

Making a pottery pie plate is one thing, selling them is quite another. Lookers on say the same thing; 'they are nice, but you can't bake in them'. My question 'since when can't you bake in a ceramic baking dish?'. Just make a pie and put it in the oven. No special clay no prep of the dish. So, let's just focuse on the pie a Slovenian onion pita.