In a medium bowl, combine 4 cups of water, turmeric powder, and salt. Mix well. Place the peeled banana and let it soak for at least 10 minutes.
Pat dry the banana using a paper towel and slice the bananas using a mandolin slicer.
In a medium bowl, add some coconut oil and turmeric. Mix well. Then place the sliced bananas and toss until fully coated.
Preheat the air fryer to 350°F (176°C). Place the sliced raw banana in the air fryer basket and spread them in a single layer (cook in batches if required).
Air fryer them at 350°F (176°C) for 10 minutes or until they are crispy and done. You may want to air fry for additional 3-4 minutes. Shake the basket halfway through.
Once done, sprinkle some salt and Enjoy or place the banana chips in an air-tight container.
Notes
Note: Nutrition values are my best estimates. If you rely on them for your diet, use your preferred nutrition calculator.