Preheat the oven to 350 degrees F (180 degrees C). Grease and flour a 9 by 5 inch loaf pan.
In a medium mixing bowl, combine the Oat Flour (1 cup), Almond Meal (1/3 cup), Gluten-Free Baking Powder (2 teaspoon), Sea Salt (1/4 teaspoon), and Xanthan Gum (1/3 teaspoon). Whisk together with a fork until incorporated. Add the Pecans (1/3 cup).
In a large mixing bowl, stir together the Banana (1 cup), Coconut Oil (1 cup), Maple Syrup (1/2 cup), and Vanilla Extract (1 teaspoon). Add the Large Egg (2), one by one, mixing after each addition until smooth.
Add the dry ingredients to the bowl in two additions, mixing until just combined. Transfer the batter to the prepared pan and bake until the top is golden brown and a toothpick inserted into the center comes out clean, about 55 minutes.
Allow the bread to cool completely in the pan. Cut into slices and eat warm, or store in an airtight container for later.