4 tsp grated lime zest (about 7 limes), plus extra for garnish
1 lime, very thinly sliced
240ml/8陆fl oz freshly squeezed lime juice (about 7 limes)
6 sprigs mint
2 x 400g tins condensed milk
400g/14oz plain flour
4 tsp ground ginger
80g/3oz icing sugar
icing sugar
1 tbsp olive oil (if needed)
pinch salt
3 lumps of stem ginger, chopped
225g/8oz sugar
1 tsp grated plain chocolate
250g/9oz cold unsalted butter, cut into cubes
4 eggs, separated
3 free-range eggs, yolks only