Green tea & vanilla pannacotta with chocolate sauce

INGREDIENTS

• 100 ml milk
• 1 vanilla pod, split and seeds removed
• 3 green tea bags, or 2 heaped tablespoons of green tea
• 350 ml double cream
• 1¼ leaves beef gelatine, soaked in water
• 70 g icing sugar
• 30 g caster sugar
• 150 ml water
• 1 level tablespoon cocoa powder
• 100 g good-quality dark chocolate (70% cocoa solids), broken into pieces