Preheat oven to 450°F.
Brush a 15½ x 10½-inch jelly-roll pan with oil, and arrange potatoes in a single layer in pan.
Bake 10 minutes.
Flatten potatoes, using the back of a wooden spoon until rounds touch and cover entire pan.
Bake 20 more minutes or until crisp. Top with remaining ingredients.
Bake 5 to 10 minutes or until cheese melts.