Crack the eggs into a bowl.
Add fish sauce or soy sauce and water.
Whisk the mixture until slightly frothy.
Stir in chopped green onions and black pepper.
Heat oil in a frying pan over high heat until very hot (the oil should shimmer).
The oil is ready when a drop of egg mixture sizzles immediately.
Once hot, pour the egg mixture into the pan.
Pour the egg mixture from a slight height into the hot oil to create a light, airy texture.
Let it puff up without stirring, then gently shape or fold if needed.
Gently tilt the pan to spread the eggs evenly.
Cook until the edges turn golden and crispy.
Flip or fold gently once the bottom is set and golden.
Remove from the pan once fully cooked.
Serve immediately while hot and crispy.