INGREDIENTS
1/4 cup
Rolled oats, old-fashioned
13/16 cup
All-purpose flour
9/16 cup
Brown sugar, light lightly packed and separated
1 1/2 tsp
Cinnamon, ground
5/8 cup
Granulated sugar
3/4 tsp
Sea salt, fine
1
disk Pie crust, homemade or store-bought
6 tbsp
Butter, unsalted
3 pounds (about 6 medium-sized) tart, crisp apples, cut into 1/4" slices