Heat avocado oil over medium heat in a medium skillet. Add bell pepper, zucchini, and carrots. Cook, stirring occasionally, for 3-4 minutes or until vegetables begin to soften.
1 tablespoon avocado oil, 1 red bell pepper, 1/2 cup finely diced zucchini, 1/4 cup finely diced carrots
Stir in spices and cook for an additional minute. Remove from heat and let cool for 5 minutes.
In a large bowl, combine ground beef and cooked vegetables. Mix well with hands. Using a meatball scoop, form meat into meatballs. You should get between 12-16 meatballs depending on the size of the scoop you use.
1 pound ground beef
Spray the basket of the air fryer with cooking spray (I use avocado oil spray). Place meatballs into basket (see note below).
Cook meatballs at 370 degrees for 12 minutes. Check for doneness and, if necessary, cook for another 3-4 minutes until cooked through.
Notes
Depending on the size of your air fryer, you may need to cook the meatballs in two batches.