Your choice of burger toppings (I like lettuce and tomato)
Method
For the cajun fries, slice the potato into chips, keeping skin on
rinse with water to get rid of some starch and pat dry
season the chips with salt and pepper, coat in a little oil and the Cajun seasoning
place the chips in the air fryer at 180°C for 25 minutes
for the burger, fry off the onions in a little oil until caramelised with a pinch of sugar and salt, add a splash of water to help them along, and set aside
bash down the burger patty to make a little thinner and fry on both sides until cooked, you could also bash it down while its cooking instead, meanwhile toast the bun
assemble the burger with the bun, patty, sauces, cheese, toppings and fried onions
wrap the burger in tin foil and place in the air fryer with the cooked chips for a couple of minutes to melt the cheese