Prepare the Hen: Pat dry with paper towels. Truss the legs and tuck the wings under the body. Optional: Stuff cavity with lemon and herbs.
Season the Hen: Rub olive oil or butter all over. Mix garlic, salt, pepper, and herbs; rub inside and out, under the skin if possible.
Set Up Rotisserie: Preheat to 375°F (190°C). Secure the hen on the rotisserie spit, ensuring it is balanced.
Cook: Rotate for 45–55 minutes until internal temperature reaches 165°F (74°C). Optional: Baste with butter or pan juices halfway through.
Rest and Serve: Remove the hen, let rest 10 minutes, then carve and serve.