Place oats in a food processor and grind to a flour texture.
Preheat oven to 350 degrees F
Whisk ground oats, PBFit peanut butter powder, baking powder, baking soda and salt in a small bowl and set aside.
In the bowl of an electric mixer, blend butter (or oil) and maple sugar until smooth.
Add egg, vanilla and water and blend until mixed.
Stir in oat mixture and blend on low speed until a sticky dough is formed.
Spray a 24 cup tart pan with cooking spray and drop mixture in tablespoon-size scoops, dividing evenly in cups.
Press down on each tart dough ball to slightly flatten with a tart tamper.
Bake for 10 mins.
While tarts are baking, place chopped apples in a microwave-safe bowl and sprinkle with cinnamon.
Cover apples and microwave for 3-4 minutes until soft.
Stir apples and set aside until tarts are done.
As soon as the tarts come out of the oven, press down on each with the tart tamper to make a well for the filling.
Spoon apple filling in each of the tart shells.
Prepare the drizzle by placing 1 tbsp butter, 2 tbsp maple sugar and splash of cream in a small microwave-safe dish.
Microwave on low setting, stirring every 10 seconds until mixture is smooth.
Drizzle over tarts and serve.