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, continue to bake if they are not dried out.
Let cool to room temperature before serving.
0 servings
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.