TIP - From my friend - Smooth top. Steam with low to medium heat and wipe the lid as often as possible Wipe and put back the lid as often as possible for the first 15 minutes. Thereafter every 5 mins. Use low to medium heat NOT high. High heat will create wave pattern on the top. Too low heat will cause the centre of the topping not to cook properly. After 30 mins open the steamer. Let it open. Turn off the fire when the surface already dry. Let it cool off for about 2-3 hours then slice...