Caramelized Banana Overnight Oats

0 Prep: Line your air fryer basket or tray with parchment paper. (see recipe notes for an oven option!)
1 Caramelized Bananas: Cut each banana into 1/2” coins and arrange on the parchment paper. Spray lightly with spray oil, flip, and spray again. Air Fry at 415F for 15 to 18 minutes, until the bananas are golden on top. Set aside and let cool for 5 minutes.
2 Banana “Milk”: Add about half of the caramelized bananas to a blender along with the milk, maple syrup, vanilla, cinnamon (if using), and salt. Blend on high for 45 to 60 seconds, until smooth.
3 Mix: Add the oats, chia seeds, yogurt, and banana milk to a large bowl and mix well. Let the mixture sit for 5 minutes to thicken slightly, then mix again.
4 Divide: Fold the remaining caramelized banana coins (I save a few as a topping) into the thickened oats, then divide between serving containers. Seal and store in the refrigerator for up to 5 days.