Apple Slab Pie with Crumb Topping

INGREDIENTS

3 cups

all-purpose flour

1 tbsp

granulated sugar

1 tsp

salt

1 cup

very cold unsalted butter, cut into cubes

8 tbsp

ice water

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 tsp

ground cinnamon

12 tbsp

cold unsalted butter, diced

10 cups

apples, peeled and thinly sliced (I use Granny Smith)

1 tbsp

fresh lemon juice

2/3 cup

granulated sugar

1/3 cup

all-purpose flour

1 tsp

vanilla extract

1 1/2 tsp

ground cinnamon

1/4 tsp

ground allspice