Wash peppers and slice off the tops. Remove all seeds and membranes from the inside.
In a large saucepan, brown ground turkey until cooked through.
Add rice, diced tomatoes, and taco seasoning to the meat. Mix until combined. Scoop the mixture into peppers, filling them to the top.
Place the peppers in the air fryer basket and air fry for 10 minutes. Add cheese and fry for 2-3 minutes more until the cheese is melted. Depending on the size of your air fryer, you may need to repeat this step until all peppers are cooked.
Serve immediately.
Notes
Make-ahead: Prepare filling up to 2 days ahead; refrigerate until ready to stuff and cook.
Storage: Refrigerate leftovers in an airtight container for up to 4 days.
Freeze: Wrap cooled peppers individually and freeze for up to 3 months.
Reheat: Air fryer at 350°F for 5–6 minutes, or microwave 2–3 minutes.
Substitutions: Ground beef or chicken work in place of turkey. Cauliflower rice for a low-carb swap.