Brush sides and bottom of a 9 x 13 baking dish with some of the melted margarine. Place one sheet of phyllo in bottom of dish; brush with butter. Repeat with 5 more sheets of phyllo. (Keep remaining dough covered with waxed paper to avoid drying out.) In a bowl, combine chicken, bacon, broccoli and cheese; spread evenly over phyllo in baking dish. In another bowl, whisk together eggs, cream, milk, salt and pepper; pour over chicken mxiture. Cover filling with one sheet of phyllo; brush with margarine. Repeat with remaining phyllo dough. Brush top with remaining margarine.
Bake, uncovered, at 190ºC or 35 40 minutes or until a knife inserted near the center comes out clean.