HEAT oven to 375°F.
MAKE 7 to 9 diagonal cuts in top of each potato, cutting about 3/4 of the way into potato. Place on baking sheet sprayed with cooking spray.
SPREAD slices of 1 potato apart; drizzle with 1 Tbsp. dressing. Repeat with remaining potatoes and dressing.
BAKE 1 hour or until potatoes are tender. Top with cheese.