Preheat your oven to 400°F and prepare a baking sheet lined with parchment paper or lightly sprayed with olive oil.
Pound the chicken breast to an even thickness for uniform cooking.
In a shallow bowl, whisk together the egg with a pinch of salt and pepper. In another bowl, add the almond flour seasoned with a little salt and pepper.
Dip the chicken breast first in the egg mixture, then coat evenly with the almond flour mixture.
Place the coated chicken breast on the prepared baking sheet and lightly spray with olive oil.
Bake the chicken in the preheated oven for about 20-25 minutes, or until the internal temperature reaches 165°F and the coating is crispy.
Meanwhile, prepare the Greek yogurt slaw by combining shredded cabbage, shredded carrot, and Greek yogurt in a bowl. Season with salt and pepper to taste.
Once the chicken is done, allow it to rest for a few minutes before slicing it.
Assemble the sandwich by placing the crispy chicken on the whole wheat bun and topping it generously with the Greek yogurt slaw.
Serve immediately and enjoy your balanced, crunchy, and creamy sandwich.