Preheat the oven to 350 degrees. Lightly spray a 13x9 or similar sized baking dish with nonstick spray. Set aside.
In a large bowl, combine the filling ingredients. Gently toss until peaches are evenly coated. Spread the filling in the bottom of your prepared baking dish. Set aside.
In a medium sized bowl, combine the brown sugar, flour, cinnamon and salt. Whisk to combine.
Add in the cubed butter and oats. Cut the butter into the dry ingredients using a pastry cutter or a fork. Mix until crumbly.
Sprinkle the topping over the filling evenly.
Bake in the preheated oven for 45-50 minutes or until the crisp is bubbly and the topping is just slightly browned.
Allow to cool slightly before serving.
Notes
Storage: Crisp should be stored in an airtight container in the fridge for up to 3 days.