Garlicky Roasted Chicken With Garlic Jus On Garlic Toast

Ingredients

• 1 head garlic (about 20 cloves), peeled and coarsely chopped
• 1 tablespoon fresh thyme leaves, coarsely chopped
• 1/2 teaspoon kosher salt
• 2 to 3 tablespoons extra-virgin olive oil
• freshly ground black pepper
• 1 (3-1/2- to 4-pound) whole chicken
• salt
• 2 heads garlic, one whole, the other separated into cloves and left unpeeled
• freshly ground black pepper
• extra-virgin olive oil, for tossing with the garlic and oiling the chicken
• 10 fresh thyme sprigs
• 1/2 lemon, cut into 4 wedges
• 1 celery stalk, cut into 3-inch pieces
• 2 1/4 cups low-sodium chicken broth, divided
• 1/4 cup dry white wine
• 1/2 loaf day-old pain au levain or other crusty white bread, halved and cut into 1-inch-thick slices
• 2 tablespoons extra-virgin olive oil
• 1 to 2 garlic cloves, peeled and halved