This is a variation of a recipe from my cookbook, Deliciously Organic. Other vegetables that you can use are: zucchini, cauliflower, squash, bell pepper, etc.
Preheat oven to 450°F and adjust oven rack to medium position.
Pat chicken with a dry cloth to make sure the skin is dry. Stir together softened ghee (clarified butter), thyme, and 1 teaspoon sea salt in a small bowl. Gently lift the skin and rub herbed butter under the skin of breasts, thighs, and legs. Season the entire chicken generously with sea salt and pepper.
Place chicken in roasting pan. Toss red onion wedges, melted ghee, remaining 1/2 teaspoon of sea salt, and pepper in a medium bowl. Pour onions around chicken in roasting pan. Roast chicken for 30 minutes and then rotate pan 180 degrees. Continue to roast, about 25 minutes, until crisp and golden brown, and when a thermometer reaches 160°F when inserted in the thickest part of the breast. Remove from the oven and before serving, let the chicken rest for about 15 minutes to allow juices to redistribute.