Ingredients

• 4 medium-size sweet potatoes
• 5 tablespoons light brown sugar
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg
• Pinch cayenne pepper
• 1/2 stick unsalted butter
• Vegetable oil, for greasing roasting tray
• Kosher salt and freshly ground black pepper
• 1/2 cup chopped pecans