I am scheduled to take my very first pottery class next week and I have no experience in ceramics. My short term goal is to make one pot that I will use at home in my oven for cooking purposes. When i was growing up back in Greece, I remember my mom using such a pot and I want to make one just like it. Is there a special glaze and/or process that I need to use for this? I presume that after the baking the clay pot is porous and cannot be used without some sort of an additional step that will seal it. Any ideas?