Bloomin' easy vanilla cheesecake

INGREDIENTS

• 150 g unsalted butter, melted, plus extra for greasing
• 250 g digestive biscuits, crushed
• 115 g caster sugar
• 3 tablespoons cornflour
• 900 g full-fat cream cheese, at room temperature
• 2 large free-range eggs
• 115 ml double cream
• 1 vanilla pod, scored lengthways and seeds removed, or ½ teaspoon vanilla extract
• zest of 1 lemon
• zest of 1 orange
• 400 g stoned cherries
• 3 heaped tablespoons caster sugar
• 1 swig port or whisky, optional
• icing sugar, for dusting