Ricotta and spinach calzone

While the Mioorto spinach is cooking in a saucepan, cover your work surface with flour and roll out the pizza dough thinly. Add the ricotta, spinach, a pinch of salt and a drizzle of oil to a bowl. Mix everything and spread the filling over the pizza dough. Fold in half and pinch the edges shut, spread a little tomato purée over the outside then bake in the oven until the calzone is a good colour.