Preheat Oven: Preheat your oven to 350°F and lightly grease a 9×9-inch or 2-quart baking dish with coconut oil or butter.
Prepare the Filling: In a large bowl, combine sliced pears, maple syrup, lemon juice, cinnamon, ginger, vanilla extract, and salt. Sprinkle oat flour or cornstarch over the mixture and stir until well coated. Spread the filling evenly in the prepared baking dish.
Make the Crumble Topping: In a separate bowl, mix rolled oats, oat flour, sugar, cinnamon, and salt. Add coconut oil or butter and use a fork or your hands to mix until the topping forms a crumbly texture.
Assemble the Crisp: Sprinkle the crumble topping evenly over the pear mixture, ensuring full coverage.
Bake: Bake for 55–75 minutes, or until the filling is bubbling and the topping is golden brown.
Cool and Serve: Let the crisp cool for at least 10 minutes before serving. For an extra treat, serve warm with a scoop of vanilla ice cream or a drizzle of caramel sauce.