Divide the ground beef into two equal portions and roll them into balls. Flatten each into a patty slightly larger than your burger bun to allow for shrinkage during cooking. Sprinkle both sides with salt and pepper.
½ pound ground beef, Salt and pepper
Place the cut sides of the buns face up on the air fryer and toast for 3 to 5 minutes at 400°F (200°C), or until golden brown. Set them aside.
2 soft burger buns
Place the burger meat in the air fryer and cook for 3 min. Flip, add a slice of cheese, and cook for another 2 minutes. Let the patties rest for 3 minutes.
1 tablespoon olive oil, 2 slices Cheddar cheese
Mix the ketchup and Worcestershire sauce, then spread it onto the bottom bun. Layer with romaine lettuce, pickles, tomato slices, and onion rings. Place the burger patty with melted cheese on top, followed by the top bun. Add more sauce if desired.
4 romaine lettuce leaves, 1 large tomatoes, 1 red onion, 2 tablespoons ketchup, 1 tablespoon Worcestershire sauce, ¼ cup pickles
Serve immediately with your favorite sides, such as French fries or a crisp salad.