Ingredients

  • 3 1/2 lb sweet potatoes, peeled and cut into 1/2-inch cubes (10 cups)
  • 1/2 stick (1/4 cup) unsalted butter, melted
  • 3/4 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1/4 cup water
  • 2 tablespoons sugar
  • 1 tablespoon fresh lime juice
  • 1/2 teaspoon finely grated fresh lime
  • 2 tablespoons finely chopped fresh chives

Method

  • Put oven racks in upper and lower thirds of oven and preheat oven to 450°F.
  • Toss potatoes with butter, salt, and pepper in a bowl until coated well, then spread in 1 layer in 2 shallow baking pans (15 by 10 by 1 inch) and roast, uncovered, switching position of pans halfway through roasting, until potatoes are tender and undersides are browned, 15 to 20 minutes total.
  • While potatoes roast, bring water, sugar, and lime juice to a boil in a very small saucepan, stirring until sugar is dissolved, then simmer until reduced to about 3 tablespoons, 3 to 4 minutes. Toss potatoes with syrup and zest in a large bowl, then sprinkle with chives.