Toss together potatoes with oil and 1 1/2 teaspoon garlic powder, salt, and pepper. Heat a skillet over medium high heat. Add potato mixture; cook, stirring occasionally, until potatoes are browned and cooked through, 15 to 20 minutes.
Meanwhile, stir together melted butter, remaining 1 1/2 teaspoons garlic powder, thyme, and sage in a bowl until well combined. Pour over potatoes.