Preheat oven to 350 F and line 8 x 8 inch baking pan with parchment paper.
To create flax egg, in small bowl, mix flaxseed with water, and set aside for 5 minutes, or until gelled.
In large bowl, combine squash, tahini, maple syrup, coconut sugar, coconut oil, vanilla, and flax egg until smooth. Stir in cinnamon, ginger, nutmeg, cloves, salt, and baking soda. Fold in oat flour and almond flour until thick, cohesive batter forms. Do not overmix!
Scoop batter into prepared pan and spread evenly. Use spatula to smooth top—it’ll be thick!
Bake in preheated oven for 28 to 32 minutes, or until edges are set and center looks slightly underdone. Let cool completely before slicing.
Slice, warm slightly, and serve with a scoop of your favorite vegan ice cream for ultimate indulgence!