Sweet Potato Gnocchi with Gouda Cheese Sauce

Name: Sweet Potato Gnocchi with Gouda Cheese Sauce
Cuisine: European, Italian, Mediterranean
Ingredients: 1-pound red-skinned sweet potatoes (yams), rinsed, patted dry, pierced all over with fork; 6-ounces fresh ricotta cheese; 1/2 cup finely grated Parmesan cheese; 1 tablespoons (packed) golden brown sugar; 1 teaspoons plus 1 tablespoons salt; 1/4 teaspoon freshly ground nutmeg; 1 3/4 cups (about) all purpose flour; Sauce (makes 2 cups); 2 cups milk, heated,; 1/4 onion; 2 cloves garlic; 3 sage leaves; Salt and freshly ground white pepper, to taste; 3 Tbs. unsalted butter; 3 Tbs. all-purpose flour; 1 cup Gouda cheese, shredded; Sauce; 2 cups milk, heated,; 1/4 onion; 2 cloves garlic; 3 sage leaves; Salt and freshly ground white pepper, to taste; 3 Tbs. unsalted butter; 3 Tbs. all-purpose flour; 1 cup Gouda cheese, shredded