1.Grease a 20cm x 30cm slice pan; line base with baking paper.
2.Break chocolate into a medium heatproof bowl; stir over a medium saucepan of simmering water until smooth (don’t let water touch base of bowl). Working quickly, spread chocolate into pan; sprinkle with nuts, cherries and rose petals. Refrigerate until set.
3.Break into shards to serve.
It is important to work quickly with the melted chocolate otherwise it will begin to harden before you sprinkle the other ingredients.Note