Saute onion in butter.
Grind all species.
Mix everything well, meats, spices, onions, and olives.
Line a rectangular pan with pork fat. Fill with the pâté. Press well so that no air. Cover with foil. Place the mold in a can with water to cover by at least half.
Bake at 350 1 ½ hour.
Let stand one or two hours.
Refrigerate with a mold with 2 or 3 cans of food (full) on it to that weight one day at least to serve.
Serve with toast and Dijon mustard seeds, or Agraz jam and pickles.