Pork liver needs to be treated with 碱水 , 1 TBS to 3 cup of water for 30 minutes. Then clean it with water to get the residual of 碱水. If you don't add this step, it will be soft and tough. That's how they do it in the restaurants to make it ""crispy". Pork liver needs to be washed with salt and corn starch. a few times. I own a restaurant and I know what I am doing.
