
Start by pouring the beer into the plastic bottle with the top cut off containing the chicken liver and the onion cut into strips.
Cover the bottle and let everything marinate for 30 minutes.
After this time has passed, transfer all this liver to a large skillet over medium to low heat with boiling water and cook for 5 minutes.
Next, remove all the liver from the water and chop it into smaller pieces.
Transfer to a large bowl, season with the salt and the black pepper.
Add the eggs, the parsley, the hard-boiled eggs cut into smaller pieces, the grated mozzarella cheese and mix everything very well until fully combined.
Then take a handful of this mixture in your hands and shape it into a croquette.
Repeat this process with all the mixture and transfer to a large baking tray.
Place in a preheated oven at 180° C (350° F) and bake for 40 minutes.
Serve.