Slashed Chicken with Bacon Herb Butter

Bahan-bahan (4 porsi)

• 8 tablespoons (1 stick) unsalted butter, (at room temperature)
• 2 slices raw bacon, (chopped into small pieces)
• 1 tablespoon chopped fresh chives
• 1 tablespoon chopped fresh sage
• 1 teaspoon chopped fresh thyme
• 1 teaspoon grated lemon zest
• 1 teaspoon sea salt, (plus more to taste)
• ½ teaspoon freshly ground pepper, (plus more to taste)
• 1 whole (about 5 pounds) chicken
• 8 leaves fresh sage
• 2 medium garlic cloves, (sliced thinly)