Combine remaining 2 Tbsp. margarine with milk in microwave-safe bowl and microwave until margarine is melted and mixture is hot, about 1 minute (timing will depend on the wattage of your microwave). Place chips in small bowl and pour hot milk mixture over chips. Let stand 5 minutes then stir until smooth. Place a dollop of chocolate ganache over centers of cookies, spread slightly and top with remaining walnut pieces.
These delicious cookies were found at www.becel.ca