Apple pie

Ingredients

• 2 1/2 cups (375 grams) all-purpose flour
• 1 tablespoon (12 grams) granulated sugar
• 1 teaspoon (5 grams) salt
• 3 tablespoons vegetable oil
• 1 cup cool (does not have to be ice-cold) unsalted butter, cut into pieces
• 1/4 cup cool water
• 2 teaspoons lemon juice or white vinegar
• 1 recipe Pie Dough for Fruit Fillings, chilled
• 6 cups peeled and sliced (1 centimeter thick), mixed apples (such as Mutsu, Granny Smith, Royal Gala, Honeycrisp, or Cortland) about 5 medium apples
• 1 tablespoon fresh lemon juice
• 1/2 cup granulated sugar
• 1/3 cup packed light brown sugar
• 1 teaspoon ground cinnamon
• 1/4 teaspoon ground allspice
• 1/4 teaspoon ground nutmeg
• 2 tablespoons rolled oats
• 2 tablespoons unsalted butter
• 1 egg, whisked with 2 tablespoons water, for brushing
• Granulated sugar and ground cinnamon, for sprinkling