[header] How to make apple cranberry slab pie [title] Make the pastry dough. [step] Place 3 ¾ cups (450 g) of flour and 1 teaspoon of fine sea salt in a food processor. Dice 30 tablespoons (425 g) of chilled butter and cover the food processor. 
Blitz the dough ingredients until the mixture becomes crumbly. Add one tablespoon of water at a time and pulse the mixture until it starts come together.