2 tsp. cornflour
60 g caster sugar
4 egg yolks
1 vanilla bean, split, seeds scraped
100 ml pure (thin) cream
600 ml milk
1/3 cup brown sugar
2 apples, peeled, cored, thinly sliced
2 tsp. lemon juice
250 g frozen mixed berries
1 egg, lightly beaten
140 g chilled unsalted butter, chopped
1/4 cup icing sugar
1 2/3 cups plain flour