For the filling:
For the pasta:
Mix the pasta ingredients together, knead well until smooth and allow to rest for 30 minutes or so.
Peel and boil the potatoes.
In the meantime chop the parsley and garlic and sauté together with the tomato purée, parmigiano, nutmeg and salt and pepper.
Drain and mash the potatoes, fold into the sauté mix and allow to cool well.
Roll out the pasta into long, very thin strips and lay a teaspoon of filling every 4-5cms for half of the strip leaving enough margin at both sides. Fold over the empty half of the strip to cover the fillings and seal the pasta between fillings and at the sides. Carefully cut the pasta with a cutting wheel or a sharp knife.
Mugello potato tortelli are excellent with mushroom sauce, or a meat sauce made with rabbit or duck.