Prepare Sweet potato chips: Thinly slice sweet potatoes, and toss in a bowl with olive oil and salt. Lay slices in a single layer in the air fryer at 180ºC for 6-9 minutes (depending on how thinly sliced). Check the chips frequently to prevent burning. You may need to do multiple batches depending on the size of your air fryer.
To make Nacho topping: In a large frypan, heat oil, add onion and fry until softened 5-6 minutes. Add garlic and fry for a further minute. Add spices (paprika, cumin, coriander, salt, pepper) and stir for another minute.
Add tin of tomatoes, water (or stock), drained red kidney beans & spinach. Stir well and bring to a simmer stirring all the while. Once simmering, place lid on frypan and cook for 10 minutes stirring frequently, then cook for a further 5 minutes. Taste and season with more salt and pepper if required.
In an air fryer safe dish arrange sweet potato chips, top with nacho mix, sprinkle with cheese and air fry for 4-5 minutes at 180ºC (check frequently to ensure chips don’t get too brown) until the cheese has melted. (Note: for 4 serves, put two separate batches in the air fryer)
Serve with avocado, sour cream and tomato salsa.
Substitute McKenzie’s Red Kidney Beans with Cannellini Beans or Three Bean Mix for a another high protein variation.