Add unfed sourdough into a mixing bowl.
Add salt and water. Mix well.
Add oil, yeast and herbs. Mix well.
Add the flours.
Bring all the ingredients together into a dough.
Dust the worktop with some flour.
Knead the dough for 10-15 mins till its smooth and silky. The dough should not be too sticky.
Shape the dough into a ball. Rub oil over it.
Grease the bowl with some oil.
Put the dough ball into the bowl.
Cover with a damp cloth or lid and place the bowl in a warm place.
The dough should rise and become double the size in 2-4 hours, depending on how warm your kitchen is.
Gently deflate the dough.
Divide it into 2 parts for large calzone or 4 for small ones.
Dust the worktop with some flour.
Roll one part of the dough using a rolling pin into a circle of about 8-9 inches in diameter. For the small ones roll into 4-5 inches.
Grease a baking tray with some oil.
Place the rolled dough on the tray.
Do the same for the remaining dough.