Enjoy Elsa's leek & sausage ravioli from Cervere | Pasta Grannies

Elsa and husband Luciano live in Cervere, an area which grows particularly tall and sweet leeks. Here, Elsa puts them to great use as a filling for ravioli.
For the pasta: 500g 00 flour, 3 eggs, 75ml water and a tablespoon of olive oil
For the filling: 400g top quality sausagemeat (Elsa uses veal, but pork is also okay), 500g cleaned leeks, 200g grated Grano Padano cheese.
To serve: more cheese and extra virgin olive oil