What is "timphan"

Timphan is a kind of snack originally from Aceh. Ingredients to make timphan consists of fglutinous rice flour, banana and coconut milk. All this material is then stirred until a thick. Flour dough reated lengthwise and then it filled in with serikaya or grated coconut mixed with sugar. Then the dough is wrapped in banana leaves and steamed (boiled without soaking water) for 1 hour.