Wash the spinach and cook in salted water for 3 minutes or until wilted. Refresh in cold water and drain. In a pan melt the butter, add the spinach and cook for 5 minutes. Season. Add 1 egg and the Parmesan and mix together.
Cook the potatoes in salted water, drain and put through a sieve. Mix with the flour and the other egg. Work this into a dough and, on a clean tea towel that has been lightly sprinkled with flour, roll it into a rectangle to a thickness of about