Preheat your oven to 350º and spray a glass 8x8 baking dish with cooking spray or grease with softened butter.

In a large bowl, add the apples, lemon juice, sugar, and cinnamon and stir until evenly coated.

Pour the apple mixture into the prepared baking dish. 

Set aside while you prepare the crisp topping.

To make the topping, combine the flour, oats, sugars, cinnamon, and salt, in a small bowl. Stir until all the dry ingredients are well combined.

Pour in the the melted butter.

Mix all the ingredients with a spoon or clean hands until the mixture is evenly moistened and clumps start to form.

Crumble the topping over the apples, making sure to keep any large chunks intact.

Bake in a 350º degree oven for 55-60 minutes, until the topping is brown and crispy and the apples are bubbling and tender.

You can test for apple doneness by sticking a small knife in the center. If there is no resistance when pulled out, the crisp is done!

Let cool for at least an hour to allow the juices to thicken.