Preheat oven to 350 degrees F.
Spray baking sheet with nonstick cooking spray.
Wash hands with soap and water.
Gently rub eggplant under cold running water.
Slice eggplant into 1/2-inch thick circular slices. Place eggplant on a plate or cutting board and sprinkle with salt.
Let sit with salt on top for 20-25 minutes. Use a paper towel to remove any excess liquid and salt on the eggplant slices.
Spray both sides of prepared eggplant slices with nonstick cooking spray and sprinkle with pepper.
Place eggplant slices on baking sheet and bake for five minutes. Remove from oven and flip eggplant slices. Bake for an additional 3 to 5 minutes or until eggplant is tender.
Top each eggplant slice with 1 tablespoon pasta sauce. Sprinkle each slice with 1 tablespoon mozzarella cheese.
Bake an additional 3 to 4 minutes or until cheese is melted.