b.collared pork, collared pig's face, collared head, etc.: the meat of the head and other parts of a pig, ox, etc., boiled, cut into small pieces and pressed into the shape of a roll, often with the skin laid round.
ΘΚΠ
the world > food and drink > food > food manufacture and preparation > preparation for table or cooking > preparation of meat > [adjective] > cut up and pressed
collared pork1861
1861 I. M. BeetonBk. Househ. Managem. xvii. 388Collared Pig's Face (a Breakfast or Luncheon Dish).
1873 E. SmithFoods 81Collared pork is made from the gelatinous parts of the pig, as the ears, feet, and face.