1 lemon, zest only
4 pears, peeled, cores removed, cut in half
250g/9oz plain flour, plus extra for dusting
110g/4oz caster sugar
Β½ tsp ground cinnamon
Β½ tsp salt
2 star anise
2 vanilla pods, split, seeds scraped out (seeds only)
250g/9oz cold butter, cut into small cubes
110g/4oz butter
150ml/5fl oz double cream
500ml/18fl oz vanilla ice cream, to serve