In a large pot or Dutch oven, add the potatoes and a pinch of sea salt. Add water until the potatoes are fully covered.
Bring the water to a boil and boil the potatoes for 20-25 minutes until fork tender. Drain the water.
Preheat the air fryer to 400 degrees F.
Place the potatoes on a plate or sheet pan. Using a mug, cup or potato masher, gently smash each potato to a ½ inch thick.
Drizzle the potatoes with olive oil, salt, black pepper and garlic powder.
Add the potatoes to your air fryer in a single layer (you may need to cook in batches) and cook for 12 minutes.
While the potatoes are cooking, make your herb vinaigrette by combining all of the ingredients in a small bowl.
Flip the potatoes and cook for another 5 minutes until golden and crispy.
Serve topped with the vinaigrette and enjoy!