Preheat the oven to 350 degrees. Coat 6 spots in a muffin tin very well with cooking spray.
In a medium bowl, mash the ripe banana very well. Add the honey, vanilla, cinnamon and salt; mix well. Add the oats and stir until thoroughly combined.
Press 2 tablespoons of mix into the six spots of the prepared muffin tin. Gently push the mix evenly up the sides and in the bottom to form a cup.
Place into the oven and bake for 30 minutes.
Remove from the oven and cool for 5 minutes before removing them from the pan and placing them on an iron rack to finish cooling completely.
Once the granola cups have cooled, add a spoonful of vanilla Greek yogurt to the center then top with fresh strawberries, blueberries, raspberries and kiwi. Serve immediately. Enjoy.