2 1/2 Pounds Apples, peeled (if desired) and sliced thin (4-5 Granny Smith, Honeycrisp, or other baking apple)
2 Tablespoons Lemon Juice (juice of 1 small lemon)
2 Tablespoons All-purpose flour
1 teaspoon Ground Cinnamon
1/2 teaspoon Kosher Salt
1/2 Cup Granulated Sugar
Topping
3/4 Cup Rolled Oats (Old Fashioned or Regular)
1/2 Cup Brown Sugar
1/2 Cup All-purpose flour
1/2 Cup Unsalted Butter, diced (1 stick)
1/2 teaspoon Kosher Salt
Directions
Preheat oven to 375F/190C. Butter an 8-inch-square or an 8x11-inch baking dish, and set aside.
In a medium bowl, combine the rolled oats, brown sugar, 1/2 cup flour, butter, and 1/2 teaspoon of salt. Use a fork or biscuit cutter to blend everything together until it the mixture resembles small crumbs. Refrigerate the topping while you prepare the apple filling.
In a large bowl, mix together the sliced apples, granulated sugar, lemon juice, 1/2 teaspoon salt, and 2 tablespoons of flour. Pour the apple mixture into your prepared baking dish and spread into an even layer. Cover the apples with the chilled crumb topping in an even layer.
Bake until apples are cooked through and topping is golden brown and set, about 30-35 minutes. Remove from oven and allow to cool for at least 10 minutes before serving.
