Excellent fish choices for this exotic entree are halibut, cod, tilapia, and snapper. Banana leaves (the leaves of the banana plant) are large, flexible, and waterproof. Throughout the world, in countries like Thailand, India, and Mexico, they’re used as wraps for food. Steaming with banana leaves imparts a sweet flavor and aroma to dishes. Asian and Hispanic markets are your best bet for purchasing them. They’re also available online.