Preheat the oven to 375°F and lightly grease an 8-by-8-inch baking dish.
In a large bowl, stir together the rolled oats, 1 ½ teaspoons cinnamon, baking powder, and salt. Add the oat milk, maple syrup, oil, and vanilla and mix until well combined. Fold in the diced apple or pear.
Pour the oatmeal mixture into the prepared baking dish and spread into an even layer.
In a small bowl, combine the crushed Homefree Mini Cookies, coconut sugar, cinnamon, and melted coconut oil until the mixture resembles a crumbly streusel. Sprinkle the mixture evenly over the top of the oatmeal.
Bake for 35 to 40 minutes, until the center is set and the topping is golden and fragrant. Cool for 5 to 10 minutes before serving.
Serve warm with a splash of warm oat milk, dairy-free whipped cream, a drizzle of maple syrup, or a spoonful of coconut yogurt. This baked oatmeal can be made ahead, refrigerated for up to 4 days, and reheated before serving.