Preheat your Z Grills (preferably with branded applewood pellets) or other wood pellet grill to 350 degrees Fahrenheit.
Lightly oil the aluminum pan, then add the potatoes.
Drizzle the potatoes with 2 tablespoons of oil and season with salt, black pepper, and garlic powder.
Toss the potatoes, so they are coated evenly, and transfer the pan to the grill grates. Close the grill’s lid and smoke for 45 minutes. Toss the potatoes every 12-15 minutes.
Remove the potatoes from the pellet grill and set them aside to cool for 15 minutes.
Quarter the potatoes.
Whisk the yogurt, mustard, white wine vinegar (or lemon juice), and black pepper together in a large salad bowl. Fold in the dill.
Add the quartered potatoes, gently toss to coat, and taste. Add more salt if needed.
Serve immediately or cover with plastic and refrigerate for 1-2 hours to give the flavors time to meld.