Cooked this for dessert, and, surprise surprise, my husband ate most of it

Directions

Preheat your oven to 350°F (175°C) and line a 9×13 inch baking dish with parchment paper.
In a large bowl, mix together the melted butter, granulated sugar, vanilla extract, and salt until well combined.
Add the flour to the butter mixture and stir until crumbly. Reserve 1 cup of this mixture for the topping.
Press the remaining crumb mixture evenly into the bottom of the prepared baking dish to form the crust.
In another bowl, combine the diced apples, brown sugar, cinnamon, lemon juice, and cornstarch. Mix until the apples are well coated.
Spread the apple mixture evenly over the crust in the baking dish.