In a large bowl, combine the sliced apples, granulated sugar, cinnamon, nutmeg, lemon juice, and vanilla extract. Toss until the apples are evenly coated. Pour the apple mixture into the prepared baking dish and spread it out evenly.
Prepare the Crisp Topping:
In a separate bowl, combine the oats, flour, brown sugar, cinnamon, and salt. Stir in the melted butter until the mixture is well combined and crumbly.
Assemble the Apple Crisp:
Sprinkle the crisp topping evenly over the apple filling.
Bake:
Bake in the preheated oven for 45-50 minutes, or until the topping is golden brown and the apples are tender and bubbly.
Cool and Serve:
Let the apple crisp cool for a few minutes before serving. Serve warm, optionally topped with vanilla ice cream or whipped cream.
This classic apple crisp is a perfect dessert for any occasion, combining tender, spiced apples with a crispy, buttery topping. Enjoy!