Chop the rest of meat and salo in small pieces (it would be easier if you previously freeze the products a bit).
Mix all the products with ground garlic, ground pepper and salt.
You can also add white wine.
Fill previously prepared casings with forcemeat, tie from both sides and put into a cold place for 5-6 hours, until forcemeat is well salted and well marinaded.
Then pierce sausages in several points with a fork to avoid bursting, and fry with salo and onion.
Cook in oven until prepared.
Recipe by Food'n'chef at https://old.foodnchef.com/polmetra-kolbasy/