Preheat the oven or your air fryer to 200 degrees Celsius.
Cut the sweet potatoes and toss in some olive oil and sprinkle with sea salt.
Bake in the oven or air fryer for about 12-15 minutes, until the sweet potatoes are golden brown and soft. The baking time will vary a bit depending on how large pieces you make.
Meanwhile make the dressing in a small bowl.
When the sweet potatoes are ready add them to a bowl together with arugula, scallion, chopped pecan nuts and fresh mint. Serve with the lemon dressing.