Pre-fry the chicken liver.
My liver, remove the veins, dry with a paper towel. Pour vegetable oil into a hot frying pan, put the liver, fry on high heat on both sides until browned, add a little salt and bring to readiness over medium heat under a closed lid for 10 minutes. We check the readiness with a toothpick, not blood should be released, but a clear liquid. The finished liver is allowed to cool completely.