Beat egg yolks slightly. Add sugar; beat 5 minutes or until eggs are lemon-coloured.
Place cream and vanilla pod in top of double boiler; bring to boil. Pour small amount of hot mixture, beating constantly. Return to remaining hot mixture; cook over hot water 3 to 4 minutes or until slightly thickened. Remove vanilla pod.
Pour mixture into heat-resistant serving dish. Chill 6 to 8 hours or until set.
Sift brown sugar; sprinkle evenly over custard. Place under broiler about 4 inches from source of heat. Broil, watching carefully, 3 to 4 minutes or until brown sugar melts. Chill before serving.