Slice the onion thinly

Melt the oil and butte using low heat

After melted throw in the sliced onion and sprinkle the salt into the onion. Turn the heat to high and stir vigorously

After it browns, it's done. But it can be cooked more, by adding 25-50ml water every 2 minutes

After it is brown and all of the water is gone, it's done