Wash the squid thoroughly and cut it into bite-sized pieces.
Wash the green onions and onion, then cut them into appropriate sizes.
In a bowl, mix flour, water, and salt to make a batter.
Add the squid, green onions, and onion to the batter and mix well.
Generously coat a pan with cooking oil.
Spread the batter thinly in the pan and cook over medium heat until golden brown on both sides.
Place the finished squid green onion pancake on a plate to serve.