This might sound a little strange to some of you, but it's never to early to start thinking about Super Bowl and gathering your recipes together. When I lived in Marathon, actually Duck Key, Fl. in the early 80's we had a dive bar there that always had these. Perfect for guy type gatherings that include lots of beer. Make these at least 5 days before serving, plus they will last several weeks in the refrigerator.
2 1/2 cups water
In a saucepan combine water, vinegar, sugar, salt, peppercorns and allspice. Bring mixture to a boil. Reduce heat and simmer 10 minutes. Let the marinade cool until it is lukewarm. Slice knockwurst and onions and arrange them in a 2-quart jar, alternating layers. Pour marinade over knockwurst, cover jar and refrigerate 3-5 days. Will keep in refrigerator for several weeks.