Brown the sausage. In a small skillet over medium heat, cook the Italian sausage, breaking it into crumbles, until no pink remains, about 6 to 8 minutes. Drain excess fat. Remove from heat and stir the marinara sauce directly into the pan with the sausage. Set aside.
Make the ricotta filling. In a medium bowl, stir together the ricotta, egg, parmesan, garlic powder, salt, and pepper until smooth. Set aside.
Assemble the lasagna. Spray an 8×8 baking dish with cooking spray. Spread ¼ of the meat sauce on the bottom. Top with 2 sheets of lasagna noodles (break to fit). Spread on ⅓ of the ricotta mixture, tear 2 basil leaves over the top, and sprinkle with ¼ of the mozzarella. Repeat layers two more times. Finish with a top layer of noodles, the remaining sauce, and the rest of the mozzarella.
Preheat the air fryer to 360°F for 5 minutes.
Cook phase one. Place the lasagna dish in the air fryer basket and cook at 360°F for 30 minutes, uncovered. This browns the top.
Cook phase two. Reduce the temperature to 280°F. Cover the dish tightly with foil, tucking the edges under the rim of the dish so the foil does not lift in the airflow. Cook for another 20 minutes. This softens the no-boil noodles all the way through.
Rest before slicing. Remove the lasagna from the air fryer and let it rest, uncovered, for 10 minutes. Garnish with extra parmesan and fresh basil. Slice and serve.