Prep the peppers: Slice the bell peppers in half lengthwise and remove seeds and membranes.
Lightly brush or spray the inside with oil. Set aside.
Preheat the air fryer: Set it to 360°F (182°C) for 3–5 minutes so it’s hot when the peppers go in.
Cook the filling: In a skillet over medium heat, warm the olive oil. Add onion and cook 3–4 minutes until softened.
Add garlic and cook 30 seconds until fragrant.
Brown the meat: Add ground meat to the skillet. Cook, breaking it up, until no longer pink. Drain excess fat if needed.
Season and simmer: Stir in taco seasoning, tomato sauce (or salsa), black beans, and corn.
Simmer 2–3 minutes until thickened and well combined. Taste and adjust salt and pepper.
Stir in rice: Add cooked rice and mix until evenly distributed. If it looks dry, add a splash more tomato sauce or a tablespoon of water.
Fill the peppers: Spoon the taco mixture into each pepper half, packing it in.
Top generously with shredded cheese.
Air fry: Arrange peppers in a single layer in the air fryer basket. Cook at 360°F (182°C) for 10–14 minutes, or until peppers are tender and the cheese is melted and slightly golden. Thicker peppers may need an extra 2–3 minutes.
Finish and serve: Let cool for a couple of minutes.
Add toppings like sour cream, avocado, cilantro, and a squeeze of lime.