Piri-Piri Chicken

INGREDIENTS

• 1/4 cup fresh lemon juice
• 1/4 cup chopped fresh cilantro
• 1/2 cup piri-piri sauce or other hot pepper sauce
• 2 tablespoons piri-piri sauce or other hot pepper sauce
• 2 garlic cloves, minced
• 2 tablespoons fresh lemon juice
• 1 2-inch piece fresh ginger, peeled, thinly sliced
• 3 tablespoons butter
• 1 3 1/2- to 4-pound chicken, backbone removed, opened flat
• 1 teaspoon coarse kosher salt
• 1 teaspoon freshly ground black pepper
• 3 tablespoons chopped fresh cilantro
• 3 garlic cloves, peeled
• 1/4 cup extra-virgin olive oil plus additional for brushing
• 1 large shallot, peeled, quartered