Preheat oven to 425°F (220°C) and line a large baking sheet with a wire rack for maximum airflow.
Pat the chicken wings extremely dry using paper towels to ensure the skin becomes crispy during roasting.
Scrub the Yukon Gold potatoes and dice them into 1/2-inch cubes so they cook at the same rate as the chicken.
In a large mixing bowl, whisk together the olive oil, minced garlic, chopped rosemary, sea salt, black pepper, and onion powder.
Add the chicken wings and diced potatoes to the bowl, tossing thoroughly until every piece is evenly coated in the herb oil.
Spread the wings and potatoes in a single layer on the prepared baking sheet, ensuring they are not crowded.
Roast for 35-40 minutes, flipping the wings and tossing the potatoes halfway through, until the chicken is golden-brown.
Remove from the oven and let rest for 2 minutes before serving to maintain the internal juices.