Raspberry syllabub trifle

Ingredients

• 1 egg
• 3 egg yolks
• 1 tablespoon cornflour ((US=cornstarch))
• 2 tablespoons golden caster sugar
• 500 ml (18floz) milk
• 1 teaspoon vanilla extract
• 8 boudoir biscuits (broken into chunks)
• 3 tablespoons sweet marsala wine, sherry or dessert wine
• 300 g (11oz) fresh or frozen raspberries
• 75 g ratafia biscuits ((amaretti biscuits))
• 600 ml (1pt) double cream ((US=heavy cream))
• 150 ml (¼pt) sweet marsala wine , sherry or dessert wine
• grated zest and juice 1 lemon
• extra raspberries
• chopped pistachios flaked almonds or silver dragees