1.Preheat oven to moderate. Grease 20cm x 30cm lamington pan; line base and two long sides with baking paper, extending paper 2cm above edge of pan.
2.Combine coconut, sugar, sifted flour, cornflakes and Choc Bits in large bowl. Stir in combined butter and egg. Press mixture into base of prepared pan.
3.Bake in moderate oven about 20 minutes or until browned lightly; stand 5 minutes before turning slice onto wire rack to cool.
4.Cut slice into pieces. Place melted chocolate into a small piping bag and drizzle over each piece.
If you do not have a small piping bag, place the melted chocolate in a small plastic sandwich bag and snip off one corner. If the chocolate starts to set while you are piping, microwave for about 5 seconds on HIGH (100%) power. This recipe can be made a week ahead; store in an airtight container.