Assuming you would like tips on how to clean a veal liver:
The first step is to remove any excess blood or fat from the liver. This can be done by gently rinsing it under cold water and then patting it dry with paper towels. Once this is done, the liver can be cut into smaller pieces if desired.
Next, the liver should be placed in a large saucepan or Dutch oven along with some aromatics such as onion, carrots, celery, garlic, and fresh herbs. Enough water should be added to cover the liver completely. The pan can then be brought to a simmer over medium-low heat and cooked until the liver is just cooked through (around 10 minutes).
Once the liver is cooked, drain it in a colander and discard the cooking liquid. The liver can then be used in your favorite recipe or simply served with some sautéed vegetables and boiled potatoes.