Start by adding the olive oil to a frying pan and frying up the red onion and green pepper. Once softened, remove from heat. Place them in a small bowl.
In a small mixing bowl, crack the eggs, and then use a fork to whisk.
Then add the butter to the skillet, start melting, and then add the eggs and continue to cook until the eggs are scrambled.
Then to assemble your breakfast tacos, add a flour or corn tortilla to the air fryer basket. Add the sauteed vegetables and eggs, and top with about 2 tablespoons of cheese.
Air fry at 320 degrees F, air fryer setting for 4-5 minutes.
Top with your favorite toppings, sour cream, diced tomatoes, diced green peppers, etc.
Plate, serve, and enjoy!