Instructions:
- Preheat the oven to 400°F (200°C). Line a large rimmed baking sheet with parchment paper or a silicone baking mat.
- Trim the ends off the zucchini. Slice them into rounds approximately 1/4 inch (6mm) thick. Consistency in slicing is crucial for even cooking.
- Place the sliced zucchini in a large mixing bowl. Drizzle with olive oil. Sprinkle evenly with oregano, thyme, garlic powder, salt, and pepper. Toss gently until every slice is lightly coated.
- Transfer the seasoned slices to the lined baking sheet, ensuring they are arranged in a single layer. Do not allow them to overlap.
- Place the tray in the preheated oven and bake for 15 minutes.
- Carefully remove the tray. Using tongs, flip each zucchini slice over. If using Parmesan, sprinkle it lightly over the top of the slices now.
- Return the tray to the oven and bake for an additional 5–10 minutes, or until the edges are nicely browned and the zucchini is tender but not mushy.
- Remove from the oven. Garnish immediately with fresh parsley and serve warm.