01 -
Preheat air fryer to 200°C. Arrange shoestring fries in a single layer and air fry per package instructions until golden and crisp. Transfer to a tray and set aside.
02 -
Heat a large skillet over medium-high heat. Add ground beef and diced onions, cooking until beef is browned and onions have softened. Break up the meat as it browns.
03 -
Stir in minced garlic and cook for 30–45 seconds, until fragrant. Avoid browning the garlic.
04 -
Add onion powder, garlic powder, salt, and pepper. Mix thoroughly and drain excess fat from the skillet to prevent a greasy base.
05 -
Add cheddar cheese soup and cream of mushroom soup to the meat mixture. Stir well to create a cohesive and creamy filling.
06 -
Grease a 28 x 18 cm casserole dish (7x11 in). Spread the prepared beef mixture evenly over the bottom. Layer the cooked fries across the top, followed by an even sprinkling of shredded cheddar cheese.
07 -
Preheat oven to 175°C. Bake the assembled casserole for 10–15 minutes or until the cheese is melted, golden, and bubbling. Monitor closely to prevent fries from over-browning.
08 -
While baking, whisk mayonnaise, ketchup, mustard, pickle juice, dehydrated onions, and a pinch of pepper in a bowl until smooth and well-integrated. Refrigerate until ready for use.
09 -
Let casserole rest for 5 minutes after baking. Generously drizzle burger sauce over the top and serve hot.