Preheat your air fryer to 400°F (200°C).
Slice the chicken breast into even strips.
In a shallow bowl, whisk the egg. In a separate bowl, combine almond flour, grated parmesan, garlic powder, onion powder, sea salt, and black pepper.
Dredge each chicken strip into the egg wash, then coat thoroughly in the almond flour mixture, pressing gently to adhere.
Place the chicken in the air fryer basket in a single layer and cook for 10-12 minutes, flipping halfway through, until golden and crispy.
While the chicken cooks, prepare the dressing by whisking together the Greek yogurt, Dijon mustard, lemon juice, olive oil, and water until smooth.
Chop the romaine lettuce and place it in a large serving bowl.
Slice the crispy chicken and arrange it over the lettuce along with the avocado slices and shaved parmesan.
Drizzle the zesty dressing over the salad and serve immediately.