Mix potatoes and onion in a large bowl.

Add 1 tablespoon salt then mix thoroughly until well distributed. Set aside.

Heat a cooking pot and pour-in olive oil.

When the oil is hot enough, fry the potatoes and onion using medium heat. This should take between 7 to 10 minutes. Do not brown the potatoes.

Remove the potatoes from the cooking pot, turn off heat, and then drain excess oil. Let the fried potatoes cool for a few minutes.

Combine the remaining salt with the eggs then beat.

Add the cooked potato in the beaten egg mixture then stir to distribute.

Heat an 8 to 10 inches non-stick pan and pour-in about 2 to 3 tablespoons of olive oil. You may utilize the olive oil used to fry the potatoes.

When the oil is hot enough, pour-in the eggs and potato mixture. Cook for about 5 to 7 minutes in low to medium heat. Cooking time may vary, it is recommended to manually check the omelet to prevent burns.

Flip the omelet by placing a wide plate on top of the pan and turn the pan over in a way that the plate catches the omelet.

Place the pan back on the stove and gently push the omelet from the plate to the pan. Cook until the other side is done.