Preheat oven to 350 degrees. Prepare loaf pan by greasing the inside of it with oil or oil spray.

In a medium-size bowl whisk together ground flaxseeds and water, let sit for 10 minutes.

In another medium-size bowl, sift together gluten free flour, baking soda, and salt, set aside.

In a large bowl, mash bananas, then add apple butter or apple sauce, oil, and vanilla.

Add dry ingredients to wet ingredients in batches. You can split it into2 or 3 additions. Mix well after each addition.

After all the dry ingredients have been incorporated, fold in any optional ingredients you want to add.

Pour batter into prepared loaf pan and place in preheated oven.

Bake for 45 minutes then test with a toothpick. I have found that it may take slightly more time to bake. The toothpick comes out clean, but the bread is still too moist inside. If the top is nicely browned, cover loaf with foil and place back in the oven for another 5 minutes. This should help cook the bread without burning the top.

Let the bread cool for 10 minutes before flipping it over onto a platter.