Banana Leaf Grilled Fish with Coconut Cilantro Sauce

Name: Banana Leaf-Grilled Fish with Coconut-Cilantro Sauce
Ingredients: 1/2 cup (4 fl. oz./125 ml) coconut milk; Juice of 3 limes; 1 small bunch fresh cilantro; 1/3 cup (1/2 oz./15 g) fresh mint leaves; 2 garlic cloves; 1-inch (2.5-cm) piece fresh ginger, peeled and coarsely chopped; 1 jalapeño chile, seeds and ribs removed; 2 tsp. honey; Kosher salt and freshly ground pepper; 6 white fish fillets, such as halibut or cod, about 6 oz. (185 g) each; Vegetable oil for brushing; 6 large fresh or thawed frozen banana leaves