To prepare a twice cooked herbed ducks duck recipe, you will first need to prepare the ingredients for the recipe. You will need the following ingredients: 2 tbsp. kosher salt, 1/2 cup thyme sprigs, 1/4 cup fresh dill weed, 2 tablespoons olive oil, and 2 teaspoons freshly ground black pepper. Place the duck in the roasting pan and roast for 2 hours or until the meat reaches an internal temperature of 145 degrees Fahrenheit (60 degrees Celsius). Remove from the oven and allow to rest for 10 minutes before carving.