1. For the crusts: Place all the crust ingredients in a food processor and pulse until the mixture has a grainy texture.
  2. Place the mixture into tart moulds and refrigerate.
  3. For the topping: Place the maple syrup, cream, and butter-flour mixture into a saucepan over medium heat and bring to a boil for a few minutes.
  4. Turn off the heat, fill the tart crusts with the mixture, and refrigerate for one hour.
  5. Serve topped with berries, Grand Granola Essential and maple sugar flakes (if desired).