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Preheat the air fryer to 400 degrees F.
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Cut open the hot dog buns lengthwise, but don’t cut them all the way through.
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Air fry the buns in the air fryer basket for about 2 minutes or until lightly toasted. Take the buns out of the air fryer and set aside.
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Spread 2 tablespoons of tomato sauce inside each toasted bun.
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Sprinkle shredded mozzarella cheese on top of the tomato sauce in the buns.
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Cook the buns for another 3 minutes or until mozzarella is golden.
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Put the hot dogs inside the buns, add more shredded mozzarella on top of the hot dogs and then add the sliced olives.
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Cook for 3 minutes more or until the cheese is slightly golden and bubbly.
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Take the hot dogs out of the air fryer.
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Drizzle the hot dogs with ketchup and mustard. Add any other toppings you want, like diced onions, tomatoes or pickles.