1. Arrange one-third of potato slices on a large microwave-safe plate. Coat tops of potato with cooking spray, and sprinkle with one-third of rub.
2. Microwave, uncovered, at HIGH 4 minutes. Turn potato slices over. Microwave at HIGH 4 minutes or until dried, crisp, and just beginning to brown.
3. Remove from plate; cool completely on wire racks. Repeat procedure with remaining potato slices and rub.