Step 1
Coat the basket of an air fryer with cooking spray. Cut tops off peppers and reserve. Seed the peppers and set aside.

Step 2
Heat oil in a large skillet over medium-high heat. Add turkey; cook, stirring occasionally, until browned, about 4 minutes. Stir in rice and panko*optional; cook, stirring occasionally, until warmed through, about 1 minute. Remove from heat and stir in marinara, parsley, pepper and Parmesan. Divide the mixture evenly among the prepared peppers.

Step 3
Place the peppers in the prepared air-fryer basket. Nestle the pepper tops in the bottom of the basket. Cook at 350 degrees F until the peppers are tender, about 8 minutes. Top with mozzarella; cook until the cheese is melted, about 2 minutes more.