Preheat oven to 375 degrees Fahrenheit.

Lightly spray a baking sheet with nonstick cooking spray.

Cut each potato in half lengthwise.

Using a melon ball scoop, remove a small ball from the center of each potato half.

Slice a thin sliver off the bottom of each potato half to prevent rolling.

Place potato halves on the baking sheet, skin-side down.

Spray potato halves lightly with cooking spray.

Bake uncovered for 30-35 minutes, until potatoes are tender.

While potatoes are baking, combine yogurt, parmesan cheese, crushed garlic, and pepper in a small bowl.

Mix the yogurt mixture well and set aside.

Once the potatoes are tender, remove them from the oven.

Set the oven to broil.

Fill the hole in each potato with the yogurt mixture.

Place the potatoes under the broiler for a few minutes until the cheese is hot and begins to brown.