1 banana, peeled, ends trimmed off
50²µ/1¾´Ç³ú dulce de leche
40g/1½ oz caster sugar
½ tsp sea salt
1 vanilla pod, split in half and seeds scraped out
25g/1oz dark chocolate, 70% cocoa, grated
1 chocolate digestive biscuit
25g/1oz butter
100g/3½oz full-fat cream cheese
100ml/3½fl oz crème fraîche
75ml/3fl oz double cream