Mix peaches and maple syrup in a square baking dish (8 x 8 or 9 x 9).
Put oat flour, almond flour, potato starch, baking powder and sea salt into a medium mixing bowl. Whisk until combined and there are no clumps.
Make a little well in the middle of the mixed dry ingredients. And pour in maple syrup, milk, vanilla extract and apple cider vinegar.
Slowly combine with a spoon or spatula, mix until just combined but don’t over mix.
Allow to sit for a few minutes, use this time to put away the ingredients, put used items in the sink and wipe off the counters.
Drop spoonfuls on top of the filling, you should get about 16 large spoonfuls to cover the top.
Bake for 20 minutes, ovens vary but you want it to be just getting brown on the tips.
Sprinkle sugar on top, if using, and broil for 1-2 minutes to get a golden brown.
Once done, allow to cool completely. Then serve, add topping of choice it you want.
Notes
I measured the flours by scooping the measuring tool into the flour and then scraping the extra off with a knife. Make sure to measure the grams or use this method for accurate results.
Be aware of the almond flour you use because some produce less fluffy results than others, I use fine grain.