Nettle Ravioli with Butter and Sage

1 lb. nettles, spinach or Swiss chard, stems or rib s removed

3 Tbs. extra-virgin olive oil

1 garlic clove, minced

3/4 cup ricotta cheese

1 egg yolk

Salt and freshly ground pepper , to taste

1 lb. fresh pasta sheets

right)

2 Tbs. coarse salt

For the sauce :

6 Tbs. ( 3/4 stick) unsalted butter

24 fresh sage leaves

1/2 cup grated Parmigiano-Reggiano cheese

1/2 cup chopped toasted pecan s