Rub the outside of the chicken with olive oil and one slightly
crushed clove of garlic.
Place onion, lemon, and garlic inside the chicken. Season
chicken inside and out with sea salt and freshly ground black
pepper.
Place the chicken breast-side down on a roasting rack or
parchment-lined baking sheet. Bake chicken in the preheated oven for
20 minutes, and then turn the oven down to 300 degrees Fahrenheit.
Continue roasting the chicken until the internal temperature at the
thickest part of the thigh reaches 165 degrees Fahrenheit,
approximately 1 hour.
Remove chicken from oven and allow to rest at least 15 minutes
before carving. Don't forget to freeze the carcass for stock!