Cook from frozen. - Place the unopened bag in a pot of boiling water until hot (about 20 minutes without thawing). - In a microwave oven: Remove plastic film and top and heat the tray for 10 to 15 minutes at maximum power. - In a conventional oven: Preheat oven to 180°C / 350°F. Remove plastic film and top and heat the tray for 45 to 50 minutes. The use of the oven is not recommended because the product will tend to dry a little.