Dice the onion and place it in a skillet with your ground beef. Crumble it into small pieces with a spatula until browned and cooked through for, about 5 minutes. Remove the renderings and add the taco seasoning and a small amount of water to coat the beef.
While the ground beef is cooking, place the low carb tortilla in a heat-safe bowl or taco salad bowl mold and spray it with cooking spray. Place it in the air fryer and cook. for 5-7 minutes.
Wash your produce and dice the lettuce and tomatoes into small bite-sized pieces.
Remove your taco salad bowl from the air fryer and begin layering your ingredients.