Grease and line an 8×8 inch baking pan with parchment paper. Preheat the oven to 350°F.

In a large bowl, combine the oat flour, white rice flour, sweetener, baking powder, salt, ginger, and nutmeg. Stir well to combine.

Add the melted coconut oil and mix until the mixture becomes crumbly.

Add two tablespoons of water and stir until a thick, pliable dough forms. Add an extra tablespoon of water only if needed. Let the dough sit for 5 minutes to absorb the liquid.

Slice the pears into thin slices, about ¼ inch thick. Set aside.

Set aside one third of the dough in a small bowl. Press the remaining dough evenly into the prepared baking pan to form the base.

Arrange the pear slices evenly over the dough base.

Add the rolled oats to the reserved dough and mix with your fingers to form a crumbly topping. Pieces should be no larger than a pea.

Sprinkle the crumble mixture evenly over the top of the pears.

Bake for 30–35 minutes, or until the top is golden and the edges are set.

Remove from the oven and let cool in the pan for at least 20 minutes before removing. Let cool completely before cutting.