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Peel the sweet potatoes and slice into ½ cm sticks. Put in a bowl, drizzle over the oil and give them a good toss to coat. Sprinkle over the paprika, mixed herbs and ½ tsp each of salt and pepper, then give it all a good mix with your hands to ensure it's evenly coated.
Cook, in batches, in a single layer in your air fryer basket at 180C for around 10-15 mins, until lightly golden, giving a little shake or toss after 5 mins. Once all the batches have cooked, return the fries to the air fryer, give it a good shake and cook for a further 1-2 mins to heat through.