Next, in a large bowl, mix the flours, baking powder, salt, and sugar together until combined evenly. Then, make a well in the middle of the dry ingredients and pour in the melted butter, coconut milk, and eggs. Using a whisk, mix together the wet and dry ingredients until smooth. Pour this mixture into the banana leaf-lined skillet and bake for 16 minutes. Then remove from the oven and top with the salted egg and cheese before returning to the oven and baking until a toothpick inserted into the middle comes out clean, about 20-25 more minutes. When the dish is done, remove from the oven and brush with more melted butter before sprinkling with coconut. Serve and enjoy!