Apple Slab Pie with Crumb Topping

Ingredients (21)

• For the Pie Dough:
• 3 cups all-purpose flour
• 1 tablespoon granulated sugar
• 1 teaspoon salt
• 1 cup very cold unsalted butter
• 8-10 tablespoons ice water
• For the Crumb Topping:
• 1 cup all-purpose all-purpose flour
• 1 cup old-fashioned oats
• 2/3 cup packed light brown sugar
• 1/2 cup granulated sugar
• 2 teaspoons ground cinnamon
• 12 tablespoons cold unsalted butter
• For the Apple Filling:
• 10 cups apples
• 1 tablespoon fresh lemon juice
• 2/3 cup granulated sugar
• 1/3 cup all-purpose flour
• 1 teaspoon vanilla extract
• 1 1/2 teaspoons ground cinnamon
• 1/4 teaspoon ground allspice