In a mixing bowl, combine all-purpose flour, water, and fish sauce. Mix until the batter is smooth. For a vegetarian option, you can use salt instead of fish sauce.

Wash and chop the chives into small pieces. Dice the onion.

Add the chopped chives and onion to the batter and mix everything together until well combined.

Heat a non-stick pan over medium-high heat and add a generous amount of cooking oil.

Pour the batter into the hot pan and spread it evenly to form a large, thin pancake.

Cook for a few minutes until the bottom is golden brown and crispy. Flip the pancake over.

Drizzle more cooking oil around the edge of the pancake and cook the other side until it's also golden brown and crispy.

Once cooked, transfer the pancake to a plate. Cut it into pieces like a pizza and serve immediately.