Preheat oven to 425 degrees. Line a baking sheet with aluminum foil, and lightly spray with non-fat cooking spray.
Wash and scrub potatoes, and cut into quarters or bit sized pieces.
Place all ingredients in a large Ziplock bag, and shake well to evenly coat the potatoes and onions.
Pour onto baking sheet, and spread out evenly. Sprinkle with a bit of salt and pepper. Place in oven and cook for about 30 minutes, or until potatoes are browned well and soft.