Chocolate pecan pie

Pastry

• 250 g plain flour, plus extra for dusting
• 60 g white sugar
• 150 g unsalted butter, chilled and cut into pieces
• 1 egg yolk
• 40 g cold water

Filling

• 100 g dark chocolate chips
• 300 g pecan halves
• 30 g unsalted butter, cut into pieces
• 80 g white sugar
• 80 g brown sugar
• 50 g pure maple syrup, plus extra for brushing
• 2 eggs
• 3 egg yolks
• 1 tsp natural vanilla extract
• cream or ice cream, to serve