Place 250g of the flour, the yeast and 150mls of the water into a bowl

Mix until a thick dough has formed

Cover with a damp cloth and leave to prove overnight (min 9 hours)

Add the rest of the flour, water and olive oil and knead for 5 minutes

Cover with a damp cloth and leave to prove for an hour

Prepare a baking tray

Lightly dust your worktop with flour and place the dough onto the flour

Shape into a ball, covering the entire surface with flour

Using a sharp knife, slash the dough in several places

Place onto your baking tray and cover with lightly oiled clingfilm and leave to prove for an hour

Preheat the oven to 220° Celsius

Bake for 30 minutes and leave to cool before serving warm