In a large bowl, add the beans, potatoes, spinach, mushrooms, and seasoning and with your hands, mix until well combined.
Make 4 equal-sized patties from the mixture.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 370 °F to preheat for 5 minutes.
After preheating, arrange the patties into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 14-15 minutes.
While cooking, flip the burgers once halfway through.
After cooking time is finished, remove the burgers from Air Fryer and serve.