Hi to all. From my point of view, the best gnocchi sauce is a "sausage ragout". Fry a well-broken onion in EVO, and put some sausage of the best quality in the pot. When they colored, put some white wine, let the wine evaporate, put tomato sauce, salt (not so much!), cover, reduce the fire to the very minimum, and then wait (a good ragout is ready after at least 3 hours cooking).
To avoid gnocchi reduce to a mush, use this tecnique: take a pot, put in it a cookware of ragout, a cookware of gnocchi and parmesan cheese (original!), and repeat.
Bye from Pisa (Tuscany)!
(... and sorry from my very bad english, but i love too much cooking!)