Cut the fish into 6 pieces, about 3-inch rectangles, and season with salt and pepper. Thoroughly mix the coconut milk, sliced onion, turmeric, paprika, curry powder, ginger, garlic, chile, and fish sauce together. Add the fish pieces, mix well, and marinate for 15 minutes. Fold two sides to 1-inch height each, and fold the comers on the other ends to meet in the center. This will make a point at both ends. Fold these points down twice and secure with a toothpick, creating a small pocket. Place 4 ounces of vegetables into the pocket. Place the fish over it, finishing with a few slices of Thai chile on top. Steam the pockets for 7 minutes. Serve immediately and garnish with scallions.
**can be obtained at Asian and Latin grocers.
Recipe courtesy of Irene Khin Wong, Saffron 59 Catering