Preheat your oven to 350°F (175°C).

In a large bowl, mix the sliced apples with lemon juice, granulated sugar, ground cinnamon, and nutmeg. Toss to combine and coat the apples evenly. Transfer the apple mixture to a baking dish.

In another bowl, combine the flour, rolled oats, brown sugar, and salt.

Add the cold butter pieces to the flour mixture. Use your fingers or a pastry cutter to work the butter into the dry ingredients until the mixture resembles coarse crumbs.

Sprinkle the oat mixture evenly over the apples in the baking dish.

Place the baking dish in the preheated oven and bake for about 40-45 minutes, or until the topping is golden brown and the apples are tender.

Once done, remove from the oven and let it cool slightly before serving.

Serve the apple crisp warm, optionally with a scoop of vanilla ice cream or a dollop of whipped cream.

Enjoy your homemade apple crisp!