Heat olive oil in a skillet over medium heat. Sauté the diced onion until soft. Add ground beef and cook until fully browned. Season with salt and pepper. Set aside.
1 pound ground beef, 1 tablespoon olive oil, ½ cup white onion, Salt and pepper
Slice the Hawaiian rolls in half horizontally, keeping the top and bottom halves connected, and place them in a baking dish that fits your air fryer. Brush the cut sides with melted butter and sprinkle with garlic powder. Place cut-side up in the air fryer and air fry at 350°F (180°C) for 2–3 minutes until lightly toasted. Remove and set aside.
12 Hawaiian rolls, 2 tablespoons melted butter, ½ teaspoon garlic powder
In a small bowl, mix the mayonnaise, pickle relish, onion, mustard, white vinegar, paprika, onion powder, garlic powder, and salt until smooth. Set aside.
½ cup mayonnaise, 2 tablespoons sweet pickle relish, 1 tablespoon grated onion, 2 tablespoons mustard, 1 teaspoon white vinegar, ½ teaspoon paprika, ½ teaspoon onion powder, ½ teaspoon garlic powder, ½ teaspoon salt
Spread Big Mac sauce on both the top and bottom halves of the rolls. On the bottom half, place 4 slices of cheddar cheese.
8 slices cheddar cheese, Fresh lettuce
Spoon the cooked beef mixture evenly on top of the cheese. Layer with the remaining 4 slices of cheese and shredded lettuce. Place the top half of the rolls over the filling. Brush the tops with olive oil.
Carefully place the assembled sliders into the air fryer basket (on parchment paper or foil for easy cleanup). Air fry at 350°F (180°C) for 5–7 minutes, or until the cheese is melted and the tops are golden brown. (Check halfway to ensure even cooking.) Slice along the seams to make individual sliders.
Serve warm with extra sauce on the side if desired.