The pizza is a piece of bread without yeast , flattened and round with oil, salt , lard and chopped tomatoes, anchovies, pieces of cheese on top and cooked in a wood oven . Il pizzaiuolo , pizza man sells this type of plate which was originally a Greek dish or Osca . The pizza man sold his pizzas on the road or in a fixed place . On the road he took his pizzas hung on a stick . The other sold his pizzas outside where his oven was on the road . Whilst others had a tavern where the people went to eat the pizzas