Red Snapper Grilled in Banana Leaves

Name: Red Snapper Grilled in Banana Leaves
Ingredients: 2 cups fresh cilantro; 1 cup fresh mint; 2 Thai bird chile peppers, stemmed and roughly chopped; 1 1-inch piece fresh ginger, roughly chopped; 1 scallion, roughly chopped; 1/2 cup unsweetened coconut flakes; 2 tablespoons sugar; Kosher salt; 1/2 cup canned coconut milk; 1/4 cup fresh lime juice (from 2 limes); 3 tablespoons vegetable oil; 2 tablespoons fish sauce; 3 or 4 large banana leaves (at least 24 inches long), rinsed; Vegetable oil, for brushing; 1 large whole red snapper (3 1/2 to 4 pounds), cleaned and scaled; 1 lime, sliced; 1 2-inch piece fresh ginger, sliced into coins; 4 Thai bird chile peppers, halved lengthwise; 4 sprigs cilantro; 4 sprigs mint