For amazing bratwurst, cube 3 lbs of meat (2.5 lbs ground pork shoulder or butt plus 0.5 lbs beef or pork fat) and cool in the freezer for 20 minutes.  Grind with 1/4" die, blend in 2 oz Burlington Bratwurst Seasoning and 1/2 cup milk and process in a food processor until smooth.  Make into links or patties.