If you are tired of the offal being tough and bitter, then you need to analyze your cooking method.
It is possible that the technology you have chosen is not the best one for working with this type of product.
Some people think that it is necessary to use milk or baking soda to work with liver. As it turns out, you can make the offal juicy, soft and tender without these difficulties.
We are used to the fact that for frying it is recommended to thoroughly heat the frying pan with vegetable oil to ensure a consistently high temperature.
However, this approach can ruin the liver. Often, it is because of the high temperature that the dish turns out tough. Therefore, stick to the golden mean: the oil should not boil, but you should not fry in a cold frying pan either.
Professional chefs use one secret ingredient when frying various foods that allows them to achieve excellent results.
We are talking about butter. You definitely shouldn't fry liver in it, as it won't withstand high temperatures. However, you can add a piece of the product to vegetable oil.