Frozen banana leaves, which are inedible, are available at Asian markets and grocerythai.com. If you can't find them, parchment works just as well. Recipe adapted from Amanyara Resort, in Turks and Caicos.
This meal comes together especially easily when using extra roasted vegetables reserved from Cauliflower Steaks with Roasted Pepper and Tomato Salad. If you haven't made that recipe, simply roast 1 cup of cauliflower florettes and 1 1/2 pints of grape or cherry tomatoes.