SPINACH GNOCCHI WITH FONTINA CHEESE

Steps:

• Steam potatoes until very tender, about 35 minutes. Cool potatoes slightly and peel. Mash potatoes in large bowl until smooth. Set aside.
• Meanwhile, bring 2 inches of salted water to boil in large pot. Add spinach leaves to pot and cook until wilted, stirring occasionally, about 2 minutes. Drain spinach, reserving 1/4 cup cooking liquid. Squeeze out as much liquid as possible from spinach. Puree spinach in processor, adding reserved cooking liquid 1 tablespoon at a time if necessary to help puree and scraping down sides of processor bowl occasionally.
• Transfer spinach mixture to bowl with potatoes. Mix in egg, ground nutmeg and enough flour until soft and slightly sticky dough forms. Season dough to taste with salt.
• Dust baking sheet with flour. Working in batches and using floured hands, roll 1/4 cup dough on lightly floured work surface to form 12-inch rope. Cut rope into 1-inch pieces. Roll each piece between palms to form oval ball. Lightly flour the wires of a whisk. Using thumb, gently roll each ball down length of wires, making ribbed impressions in gnocchi. Transfer gnocchi to prepared baking sheet. Repeat rolling, cutting and shaping of remaining dough.
• Preheat oven to 400°F. Butter 13x9-inch baking dish. Working in batches, add gnocchi to large pot of boiling salted water and cook until gnocchi rise to surface of water, about 4 minutes. Using slotted spoon, remove gnocchi from water, draining off excess, and transfer to prepared baking dish. Pour 1/4 cup melted butter over gnocchi; toss thoroughly to coat. Top with Fontina cheese slices. (Gnocchi can be prepared 1 day ahead. Cover and refrigerate.) Bake until gnocchi are heated through and cheese bubbles, about 10 minutes.