Preheat the oven to 450°F. Place the chicken pieces in a large roasting pan. Sprinkle the salt and pepper evenly over the chicken.
Add the softened butter to a small mixing bowl. Add the dried sage, rosemary, and thyme. Zest the orange and lemon over the butter. Use a fork to blend all the seasonings into the butter. Spread the herb butter evenly over the chicken pieces.
Chop the onion, orange, and lemon each into quarters. Scatter the pieces evenly throughout the roasting pan.
Roast the chicken for 1 hour or until the internal temperature of the thickest part of the meat registers 200°F with a probe thermometer. You may want brush the melted butter over the chicken with a pastry brush after the first 30 minutes.
Transfer the chicken to a platter. Serve with the roasted onions on the side if desired.
NOTE: The pan drippings can be used to make my freezer-friendly chicken gravy if desired.
