Cool Ranch Zucchini Chips

Preheat oven to 225°. Grease a large baking sheet with cooking spray. Slice zucchini into very thin rounds, using a mandolin if you have one! Pat zucchini with paper towels to draw out excess moisture. In a large bowl, toss zucchini with oil then toss in ranch seasoning, oregano, salt, and pepper. Place in a single layer on baking sheets.  Bake until crispy, about 1 hour 20 minutes, checking after about an hour. Let cool to room temperature before serving. Grease air fryer basket lightly with cooking spray. Slice zucchini into very thin rounds, using a mandolin if you have one! Pat zucchini with paper towels to draw out excess moisture.  Omit oil. In a large bowl, toss zucchini with ranch seasoning, oregano, salt, and pepper. Place in a single layer in basket (a little overlapping is fine!). Air fry at 375° for 6 minutes, then flip and cook for another 6 minutes. Remove golden chips and continue cooking remaining chips until golden and crispy, 2 to 4 minutes, shaking basket every minute to allow for even crisping.