French Terrine

Ingredients

• ["Ingredients for 2 or 3 big terrines (15 to 20 people).", "(For 1 big terrine, you can divide these quantities by two).", "1 or 2 terrine dish(es) -they must have a lid.", "1 kilo (2+ pounds) of chicken livers", "1+ pound of sausage meat", "1.5 to 2.0 pounds of ground pork (not lean, we need the fat).", "1 or 2 big slices of bread (preferably whole wheat).", "2 or 3 onions", "2 or 3 shallots", "3 eggs", "A few tbsp butter", "1 big package of thinly sliced bacon, not smoked, and preferably without nitrates", "(This is the substitute for \"caul fat\"" (crepine in French)