1Heat oven to 200°F. Line cookie sheet with cooking parchment paper; spray paper with olive oil cooking spray.
2Place zucchini slices on cookie sheet in single layer. Spray tops with cooking spray; sprinkle evenly with seasoned salt and pepper.
3Bake 2 hours, rotating cookie sheet after 1 hour. After 1 hour 30 minutes, check zucchini every 10 minutes to avoid burning. Removed from oven to cooling rack. Serve warm or cool. Store in airtight container.