Coat a 9 inch square baking dish with cooking spray and set aside.
In a medium bowl, whisk together the flour, brown sugar, cinnamon and salt.
Using a pastry cutter or two forks, work the butter into the mixture until crumbly and pea size pieces begin to form. Fold in the oats and set aside.
In a medium bowl, add the peaches, flour, sugar, cinnamon, vanilla, nutmeg and salt. Mix to combine.
Transfer the peaches to the baking dish and sprinkle evenly with the topping.
Bake the peach crisp for 45 minutes or until the topping is golden brown.
Remove from the oven and transfer to a wire rack. Cool for 10 minutes before serving.
Notes
Peach Crisp can be made up to 2 days in advance.If prepping in advance, make the filling and topping. Assemble and cover. Refrigerate until ready to bake. Uncover and bake as directed.