Preheat oven to 350 and using a paper towel, wipe nonstick donut pan with olive oil (any oil will do).
In a large bowl and using a hand mixer, mix together the maple syrup, butter, eggs and vanilla, until well combined. Set aside.
In the same bowl, add the dry ingredients and mix together oat flour, cassava flour, cacao powder, baking soda, and salt until well combined.
Using the hand mixer (or stand mixer if you have one), slowly add the dry ingredients into the wet, combining thoroughly. Once all ingredients are mixed completely, add almond milk and melted chocolate and continue to mix.
Using a spatula, fold in the powdered dehydrated strawberries, mix completely.
Using a spoon, spoon in mixture into the donut pan cavities until evenly distributed. Alternatively, you could fill a ziplock back with the mixture and cut one corner off, using it as a piping bag to easily fill the donut pan. You'll want to fill the donut pan nearly to the top/brim, so to get a nice round donut shape after done cooling.
Bake donuts for 10-15 minutes, remove from oven and allow to cool completely before glazing.