Prep the chicken. Butterfly the chicken breasts, open like a book, and pound to an even 1/4 inch between two sheets of plastic or parchment. Pat dry.
Season both sides with salt, pepper, and garlic powder.
Set up the dredging station. Place flour in one shallow bowl. Beat eggs with water in a second bowl. In a third bowl, mix panko, Parmesan, Italian seasoning, and lemon zest.
Coat the cutlets. Dredge each piece in flour (shake off excess), dip in egg, then press into the breadcrumb mixture until fully coated. Firmly press to help the crumbs stick.
Preheat the air fryer. Heat to 400°F (200°C) for 3–5 minutes.
This jump-starts crisping.
Oil for crispness. Lightly spray or brush both sides of the breaded chicken with olive oil. Don’t drench—just a thin, even coat.
Air fry in batches. Arrange cutlets in a single layer with space around them. Cook at 400°F (200°C) for 5–7 minutes, flip, spray lightly again, and cook 4–6 minutes more. Aim for internal temp of 165°F (74°C) and deep golden color.
Rest briefly. Let the cutlets sit for 2 minutes so the juices settle and the crust sets.
Serve. Toss arugula and tomatoes with a drizzle of olive oil and a pinch of salt.
Plate the chicken, top with salad, and add lemon wedges for squeezing.