Combine all ingredients in a large bowl and toss until homogenous. Let rest for at least 4 hours and up to overnight. When ready to grind, grind through a chilled meat grinder fitted with a 1/4-inch plate. Alternatively, working in 1/4-pound batches, pulse in a food processor until finely chopped. Knead chopped meat by hand in a large bowl, or with the paddle attachment in the stand mixer until slightly tacky. Cook as desired. Chorizo can be stored in a sealed container in the refrigerator for up to 5 days.