In Melbourne, you can get these in Taiwanese cuisine cafes but they are not the same... somehow the Taiwanese ones are more fluffy and floury. I've watched them cook it a few times, and I believe the fluffiness comes from adding a little surplus egg mixture into the pan while the pancake is cooking.
My version is not as authentic as they make the thin pastry from scratch. I use the widely available plain roti bread from Asian grocery stores. The important thing here is to take the roti bread out of the fridge about 30minute earlier so that they soften. Also unfold them to get as thin a roti slice as you possibly can so you're getting more egg than pancake per serve.
Once you have prepared the roti, dip the slices into your egg mix (I used two eggs in this instance). Let it soak for about 10 sec and make sure that the whole of the roti bread is soaked with egg mix. For pan-frying and for Asian cuisine I usually use peanut oil for flavour.
After you've placed the egg pancakes on the pan, add a little egg mixture on time. Preferably more evenly than I have!
End result - fluffy Taiwanese egg pancakes! Usually you should have this with thick soya sauce, but I didn't have any so I had it with Maggi Seasoning, which is just as good. I wished I had a nice cold soya bean milk drink too! Oh well.. two additional items for the grocery list.
At Grand Taipei Restaurant in Box Hill, they serve theirs with spring onion and garlic in their egg mix. I must to make this next time.