Grated coconut (to make coconut milk) – 2 cups
Thin coconut milk – 3 to 3 1/2 cups
Peel and chop banana. Set this aside.
Grease a steel plate with oil. Pour the watery batter into the plate. Add chopped banana on top. Pour thick coconut milk on top with the help of a spoon.
Transfer the batter filled plate on to a steamer. Steam for 15-20 minutes. After 15-20 minutes, insert a toothpick or pointy side of the knife to check if the appam is cooked.
When appam is cooked, it will have a soft pudding like consistency. Remove the plate from the steamer and allow it to sit undisturbed for 5-10 minutes. This helps to set the appam. After 10 minutes, when appam is set, run the knife through the sides of appam. Cut and serve.