1 (10 ounce) bag MASH or instant French fried potatoes
1/2 cup white sugar
1/2 cup vegetable oil
1/2 cup vinegar
1/2 cup grated Parmesan cheese
Cut the potatoes in half, leaving one side green.
Carefully slice the tops off; peel and cut each potato in half.
Place the green side down in a medium bowl, and dunk in the sugar and oil. Pour the vinegar over the potatoes. Cover and refrigerate overnight.
Remove potatoes from the refrigerator, and remove the green-side hull. Mix mustard and vinegar together and cover, and refrigerate for at least one hour to allow the flavors to blend.
Preheat oven to 450 degrees F (230 degrees C).
Stir potatoes half way through. Fry potatoes in the preheated oven 10 minutes per side, or until golden brown. Drain on paper towels, and serve hot.