1. In a large bowl mix together 1 tablespoon of the ketchup along with the Worcestershire sauce, Italian seasoning, garlic powder, salt, pepper, and egg. 
2. Mix in the onion and then the breadcrumbs. Once well combined, add in the ground beef.
3. Use your hands to evenly combine the meat with the egg mixture, being careful not to overmix since overmixing will make it tough.
4. Form meat into a 2 inches high 4×6 inch, loaf. Turn the air fryer to 370F and place the loaf into the air fryer.
5. Cook for 15 minutes at 370F.
6. Meanwhile, in a small bowl combine the remaining 1 tablespoon of ketchup and the mustard.
7. Remove meatloaf from oven and spread with mustard mixture.
8. Return meatloaf to air fryer and continue to bake at 370°F until an instant read thermometer inserted into the loaf reads 160F, about 8-10 more minutes.
9. Once meatloaf has reached 160F, remove air fryer basket from air fryer and let the loaf rest in the basket for 5-10 minutes.
10. Transfer the meatloaf to a cutting board and slice it into 3/4″ to 1″ slices.

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