Ingredients

• 2 tablespoons unsalted butter, softened

• 5 garlic cloves, 1 minced

• 1/2 teaspoon minced rosemary plus 2 rosemary sprigs

• 1/2 teaspoon minced thyme plus 2 thyme sprigs

• 1/2 teaspoon finely grated lemon zest

• Kosher salt

• Freshly ground black pepper

• 1 (4-pound) chicken, at room temperature

• 1 large onion, cut into 8 wedges

• 1 lemon, cut crosswise into 8 rounds

• 1 cup water, divided

• 1/2 cup chicken stock or low-sodium broth