01 -
Preheat your oven to 350°F (175°C). In a large bowl, combine the sliced apples, granulated sugar, cinnamon, nutmeg, lemon juice, and flour. Toss until the apples are well coated. Spread the apple mixture evenly in a greased 9×13-inch baking dish.
02 -
In another bowl, mix together the rolled oats, flour, brown sugar, cinnamon, and salt. Pour the melted butter over the oat mixture and stir until crumbly and well combined.
03 -
Sprinkle the topping evenly over the apple filling in the baking dish. Bake in the preheated oven for 45 minutes, or until the topping is golden brown and the apples are tender.