Dice the red potatoes and toss with olive oil, salt, and pepper. Air fry at 400°F for 16-18 minutes.

Heat olive oil in a skillet over medium-low heat and sauté diced onions for 10-15 minutes until golden brown.

Increase heat and add the ground beef to the skillet. Cook for 5-7 minutes, seasoning with salt, pepper, and Cajun seasoning.

Combine mayonnaise, ketchup, mustard, and Cajun seasoning in a bowl to make the sauce.

Layer crispy potatoes, beef, caramelized onions, and cheese in bowls, then drizzle with sauce and add optional toppings.