Taking care not to deflate the dough (or burn yourself), loosen it from the bowl sides with an oiled rubber spatula and gently invert it into the pot.

For Old Dough, mix all the ingredients together, either by hand or in a machine, until well combined. Place in an oiled plastic container and refrigerate for 24 hours before use.

Place the dough in an oiled bowl, Cover it up with a cling film and let it proof for about an hour until double in size;