Festive chocolate and orange trifle

Ingredients

• 1 x 298g can mandarin segments in fruit juice
• 2 tablespoons fat-free vanilla yoghurt
• ½ tablespoon half-fat creme fraiche
• 2–3 drops almond essence
• Zest ½ orange
• 1 tablespoon mandarin juice (from can)
• 10g dark chocolate (70% cocoa), grated
• 2 amaretti biscuits, crushed