Place the chicken breast in a shallow bowl with the buttermilk and let marinate for 20 minutes.
In a separate small bowl, whisk together 2 tablespoons of whole wheat flour, sea salt, black pepper, paprika, and garlic powder.
Remove the chicken from the buttermilk and dredge it in the flour mixture, pressing firmly to ensure an even, crispy coating.
Lightly spray the air fryer basket with oil and cook the chicken at 375°F for 12 to 15 minutes, turning halfway through until golden.
While the chicken cooks, melt the ghee in a small saucepan over medium heat and whisk in the remaining teaspoon of flour for one minute.
Gradually pour in the milk while whisking constantly until the gravy thickens to a smooth, velvety consistency.
Steam the green beans for 5 minutes until they are bright green and tender-crisp.
Plate the crispy chicken topped with the warm gravy and serve with the steamed beans on the side.