Brown the meat. In a skillet over medium heat, cook the ground beef with the diced onion and garlic until no pink remains, about 6–8 minutes. Drain excess fat.

Mix the filling. Remove the skillet from heat. Stir in the cooked rice, ¾ cup of the marinara sauce, half the mozzarella, Italian seasoning, salt, pepper, and smoked paprika until fully combined.

Prep the peppers. Lightly spray the outside of each pepper with cooking spray or brush with olive oil.

Stuff them up. Spoon the filling generously into each pepper, pressing it down as you go. Top each one with a spoonful of the remaining marinara and a sprinkle of mozzarella.

Air fry. Place the stuffed peppers upright in the air fryer basket. Cook at 360°F for 18–20 minutes, until the peppers are soft and the cheese is golden and bubbly.

Garnish and serve. Let them cool for a couple of minutes, then top with fresh parsley and dig in!