1Heat oven to 400°F. Spray 12 regular-size muffin cups with cooking spray.
2In large bowl, place potato slices. Generously sprinkle with salt and pepper; toss.
3In each muffin cup, place 2 potato slices. Sprinkle 1/2 tablespoon cheese into each cup. Add 2 more potato slices to each cup. To each cup, add 2 more potato slices and another 1/2 tablespoon cheese. Top each with a final layer of 2 potato slices. Pour 1 tablespoon cream over each.
4Bake 30 to 35 minutes or until potatoes are golden brown and tender when pierced with knife. Run knife around each gratin. Place cookie sheet or large plate upside down over pan; turn cookie sheet and pan over to release gratins. Flip gratins right side up. Sprinkle with parsley.