Combine the salt, peppercorns, hot peppers, paprika, thyme, and fennel in a spice mill or a mortar and grind to a coarse texture, not a powder. Mix in a small bowl with the garlic.
Combine the meat, fat, and spices in a large bowl.
Put half the mixture in the container of a food processor and process to a medium-coarse grind (if you are using a