In a large bowl add potatoes, olive oil, salt, pepper, garlic powder, paprika, red pepper and rosemary. With a rubber spatula or wooden spoon, toss to combine all ingredients.
Transfer to a 11x15 baking pan coated with cooking spray or nonstick foil. Bake at 400° for 25-30 minutes or until potatoes are golden and crispy, and just fork tender on the inside. Prepare glaze while potatoes are roasting.
In a small saucepan over medium heat, add the vinegar, butter and minced garlic. Simmer until reduced slightly and garlic is fragrant, about 5-7 minutes.
In a large bowl, combine roasted potatoes, balsamic glaze and chopped parsley. Gently toss with rubber spatula until potatoes are coated with glaze. Serve warm.