Preheat the oven to 375°F (190°C). Grease a 9x13-inch baking dish lightly with butter or non-stick spray.
Place the peeled, cored, and sliced apples into the prepared baking dish.
Drizzle the maple syrup over the apples.
Sprinkle the gluten-free flour and ground cinnamon evenly over the apples.
Add the water to the dish to keep the filling juicy.
Using a spoon (or your hands for a more rustic approach), gently toss the apples until they are evenly coated with the flour, cinnamon, and syrup mixture. Spread them out evenly in the dish to form the base layer.
In a medium bowl, combine the quick-cooking oats, gluten-free all-purpose flour, chopped pecans, coconut sugar, cloves, nutmeg, cinnamon, baking powder, and baking soda. Stir until all dry ingredients are evenly distributed.
Pour the melted butter over the dry mixture. Stir thoroughly until the butter is fully absorbed and the topping becomes crumbly and uniform in texture. The mixture should hold together slightly when pressed between your fingers.
Evenly sprinkle the crisp topping a top of the apples mixture in the baking dish, making sure to cover all the apples. It’s fine if the topping is a little uneven for a more rustic look. Or spread in an even layer if you wish!
Place the baking dish in the preheated oven and bake for 35-40 minutes, or until the topping is golden brown and the apples are bubbling.
Remove from the oven and allow the apple crisp to cool for about 10-15 minutes before serving. This helps the filling set and enhances the flavors.
Serve warm with a scoop of vanilla ice cream or a dollop of whipped cream for a classic pairing, or enjoy as-is for a delicious gluten-free dessert! This is the best healthy apple crisp you will taste!