Place the potatoes in the basket of the air fryer (or sheet) and cook for 15 minutes or until fork tender.
Remove the potatoes and set them on a cutting board or heatproof surface. Smash each potato to about a half-inch thick. I use a wooden spatula and press down. You can use a glass or measuring cup, whatever works.
Add the potatoes back to the air fryer basket (or sheet).
Mix the oil, mustard, garlic, vinegar, thyme, and salt and pepper.
Brush the sauce on the potatoes.
Air fry again for 5-10 minutes, or until crispy and golden brown on the outside.
Video
Notes
Use baby potatoes. These small potatoes cook quickly in the air fryer.Leave room for air to flow. Arrange the potatoes in a single layer and don't overlap them. Use two trays or cook in two batches with a basket-style air fryer if needed.Customize this recipe by using different spices or spice mixes.This recipe is vegan and vegetarian.