Preheat the oven to 400 degrees. In a shallow pan or bowl, add the beaten egg and water. In a separate pan or bowl, mix the panko or breadcrumbs, Parmesan cheese and salt and pepper. Spray a rimmed sheet pan with cooking spray. Dip an eggplant slice into the egg mixture followed by the panko/breadcrumb mixture, pushing the mixture into the eggplant. Transfer the eggplant to the sheet pan. Repeat with the remaining slices. Cook for 25 minutes or just until the eggplant is golden brown. Remove from the oven and top each eggplant slice with marinara sauce and shredded mozzarella cheese. Increase the oven temperature to broil and place the eggplant under the broiler just until the cheese is melted, about 2-3 minutes. Top with the fresh basil, serve and enjoy!