Chop the pork and pork liver with a sharp mezzaluna.
Add the crumbled sausage, grated Parmesan, crushed juniper berries, nutmeg, and cinnamon. Mix these ingredients initially.
Season with salt and pepper, add the egg yolk, and knead again.
With your hands, form walnut-sized balls and wrap them with the pork omentum.
If you don't have pork omentum, you can use cabbage leaves briefly boiled, lining the meat with them, possibly securing with a skewer.
Cook the balls over moderate heat in a pan with oil and butter. Finish cooking by adding a splash of gin and letting it be completely absorbed.
If you've used cabbage, there's no need to add gin.