Heat the olive oil in a large skillet over medium-high heat. Sprinkle the cutlets on both sides with the salt and pepper flakes. Place the cutlets in the skillet and cook, undisturbed, until golden brown on the first side, 3 minutes. Flip, and cook for an additional minute. Add the marinara sauce and turn the cutlets to coat in the sauce. Top with the mozzarella, reduce the heat to medium, and cover the pan. Cook for an additional 5 minutes to melt the cheese.
Meanwhile, combine the arugula, basil, Parmesan, sun-dried tomatoes, olive oil, vinegar and salt in a large bowl. Toss well to coat.
To serve: Place one piece of chicken on a plate and top with a spoonful of sauce. Add a bit of the salad right on top of the chicken, and serve.