1Place chocolate in a large bowl and carefully fold through cream.
2In a clean bowl, beat egg whites until soft peaks form. Gradually add sugar, beating until thick and glossy. Fold into chocolate mixture. Spoon into 6 serving dishes. Chill 1 hour until set.
3Tint cream green with food colouring, spoon over mousse. Decorate with Tim Tams as "dirt", worms and toy insects.
4Write messages on biscuits and stick into the mousse to form headstones. Keep chilled.
Photo: Rob Shaw/bauersyndication.com.au