Whole Duck Foie Gras - raw flash frozen. From Canada. Instructions: Unfrozen product must never be frozen again. Keep in freezer below -18°C. How to thaw out the product: Take the whole duck foie gras still vacuum packed out of the freezer. Place it into a kitchen sink full of cold water and leave the tap open to allow the water to renew gently. It will take 1 hour 30 min. to 2 hours to thaw out the duck foie gras. After this period the product is ready to use.