1Preheat oven to moderate, 180 C. Lightly grease and line a 20 x 30 cm slice pan with baking paper.
2In a food processor, combine biscuits, NutreMill Chocolate Cereal and flour. Pulse to form fine crumbs. Add butter and egg, processing to combine. Spread mixture evenly over base of pan, pressing down firmly with a fork. Bake 10 to 12 mins, until golden.
3FILLING: Meanwhile, in a medium saucepan, combine condensed milk, sugar and golden syrup. Stir over low heat 8 to 10 mins, until golden. Stir through nuts and pour evenly over base. Bake 10 to 12 mins, until golden. Cool completely.
4Place chocolate in a microwave-safe jug. Microwave on medium power in 30-sec bursts, stirring after each, until smooth. Drizzle over slice. Allow to set. Store in an airtight container.