Heat the oven to 375 degrees.

Coat a 9-by-9-inch casserole or deep baking dish with cooking spray.

In a large bowl, combine the butter, sugar, lemon juice, cinnamon, allspice, nutmeg, and salt. Add the apples and toss to coat. Transfer the apples, using a rubber spatula to scrape the sides of the bowl, to the casserole dish. Set aside.

In a food processor, combine the cookie dough and oats. Pulse several times, or until the mixture resembles coarse, wet sand. Use your hands to sprinkle the mixture over the apples.

Bake for 20 to 25 minutes, or until the topping is lightly browned and the apples are bubbly.

Let cool slightly before serving.