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Here is an old neighbor's recipe (the recipe, not the
  neighbor). It is excellent in hambrugers, or as condiment
  with meat entrees.
  PEPPERACE
  1 big cabbage
  9 onions
  9 red peppers
  9 green peppers
  2 Tb. celery seed
  1/4 c. mustard seed

  Mince vegetables, mix in big bowl. Add 1/2 to 1 c. coarse
  salt. Let sit overnight.
  On the morrow, strain it. Add 2 pds sugar, celery and
  mustard seed, and enough white vinegar ( I use Heinz) to
  be the save level than vegetables. Heat it until just
  before boiling.
  Hope my translating is O.K.
  Mireille, Waterloo Quebec.