Liebstoeckl (mugwort) is a traditional herb in ancient Roman cooking. If unavailable, you can substitute with a mix of sage and thyme for an earthy flavor profile.
Liquamen was a fermented fish sauce used in antiquity. For a modern substitute, use fish sauce or soy sauce, adjusting the salt accordingly.
Ensure the chicken is fully cooked by checking that the juices run clear when pierced with a knife.
Let the chicken rest for 10-15 minutes before carving to allow the juices to redistribute.