5 pounds garnet yams or other yams (red-skinned sweet potatoes), peeled, cut into 1-inch pieces
Coarse kosher salt; 1/2 cup heavy whipping cream; 1/4 cup (1/2 stick) unsalted butter; 1 tablespoon fresh lime juice; Fresh chives, chopped
Place yams in large pot. Pour enough cold water over to cover by 2 inches. Sprinkle with coarse salt and bring to boil. Reduce heat to medium; boil gently until yams are very tender, about 10 to 12 minutes. Drain well; reserve pot. Let yams stand in strainer at least 10 minutes and up to 30 minutes. Working in batches, press yams through potato ricer back into same pot or mash yams with potato masher. Combine cream and butter in glass measuring cup. Microwave on high just until warm, about 45 seconds. Add cream mixture to yams and mix with potato masher or whisk until puree is almost smooth. Stir in lime juice. Season to taste with coarse salt and freshly ground black pepper. Garnish with chives.
By, Josie Le Balch, Bon Appetit, 2009