Soak the tapioca in cold water for about 15mins and then strain. Dilute the milk powder in the 2 cups of water and pour into a pot. Bring to a boil then add the strained tapioca and staranise. Use a whisk to stir continuously to prevent it from burning. It's done when the tapioca becomes completely soft. Remove from heat,add sugar, vanilla and evaporated milk. Mix well and serve.