Leek and Lancashire Cheese Quiche

Pastry

• 150 g plain flour, plus extra for dusting
• 80 g unsalted butter, chilled, diced
• 50 g water, cold
• 1 pinch fine sea salt

Filling

• 150 g Lancashire cheese, cut in pieces
• 350 g leeks, cut in pieces (3 cm)
• 20 g unsalted butter
• 280 g single cream
• 2 large eggs
• ¾ tsp fine sea salt
• ½ tsp ground black pepper
• 1 pinch ground nutmeg