A whole oven cooked, Christmas-seasoned chicken is not just delicious, it also looks tasty and is an eye-catcher on a beautifully set Christmas table. Atria Christmas Chicken is Finnish chicken. The Christmas chicken is prepared whole by cooking longer in the oven. Take the chicken into room temperature about 30 minutes before cooking. Pre-heat the oven to 175°C. Remove the chicken from the packaging by tearing the bag open. Place in the oven in an ovenproof dish. Cook the product in the middle part of the oven at 175°C for about 1½ hours, until the inner temperature in the thickest section is 75°C. The antibiotic-free label on the package shows that the animals have not had any antibiotics during their lifetime.