01 -
Preheat the oven to 375°F. Lightly grease an 8x8 or 9x9 inch baking dish to prevent sticking.
02 -
In a large bowl, toss the sliced apples with granulated sugar, 2 tablespoons flour, 1 teaspoon cinnamon, nutmeg, and lemon juice until each slice is thoroughly coated.
03 -
Spread the apple mixture evenly in the prepared baking dish in a single layer.
04 -
In a separate medium bowl, whisk together flour, brown sugar, oats, cinnamon, and salt until well combined.
05 -
Add cold butter pieces to the dry topping mixture. Using a pastry blender, fork, or fingertips, cut the butter into the mixture until coarse crumbs with pea-sized pieces form. Avoid overmixing.
06 -
Evenly sprinkle the crumble topping over the apple layer ensuring full coverage.
07 -
Bake for 35 to 45 minutes until the topping is golden brown and apple filling bubbles at the dish edges. Apples should be tender when pierced.
08 -
Allow the dish to cool briefly to set the filling, then serve warm, ideally with vanilla ice cream and caramel sauce as accompaniments.