Perfect Roast Chicken – Brave Broth

Ingredients

• 1 5- to 6-pound roasting chicken
• Kosher salt
• Freshly ground black pepper
• 1 large bunch fresh thyme
• 1 lemon, halved
• 1 head garlic, cut in half crosswise
• 2 tablespoons butter, melted
• 1 Spanish onion, thickly sliced
• 1 cup chicken stock, preferably homemade
• 2 tablespoons all-purpose flour