Use a blender to stir the egg whites for about 1 minute
Add a tablespoon of sugar and continue to stir until foaming

Add a little bit salt to the egg yolk, then stir well
Then add the egg yolk and the foaming egg white together and gently stir

Warm the pan and put butter, pour the stirred egg liquid into the pan.

Turn to a low heat and cover it with a lid to make it cook well inside.

After the bottom is cooked, fold it in half and cover it with a lid to make it cook well inside.
Turn to a low heat and cover it with a lid to make it cook well inside