In a mixing bowl combine the potatoes, rosemary, garlic powder, salt, pepper, thyme, and olive oil. Spread the potatoes evenly over the the sheet pan in one layer.
Cook for 15 minutes, remove from the oven and toss with 2 tablespoons of the balsamic vinegar. Place back into the oven and bake for another 15-20 minutes.
Once the potatoes are removed toss with the remaining tablespoon of the balsamic vinegar.