Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper for easy cleanup.
Wash the zucchini and slice it into rounds about 1/4-inch thick, aiming for uniform slices for even cooking.
Place the zucchini slices in a large bowl and drizzle with olive oil, then sprinkle with sea salt. Toss gently to coat all slices evenly; they should glisten with oil and be slightly salted.
Arrange the coated zucchini slices in a single layer on the prepared baking sheet, making sure they don't overlap for maximum crispness.
Place the baking sheet in the oven and roast the zucchini for about 15-20 minutes, or until the edges are golden brown and crispy, and the slices have a fragrant aroma.
Remove the zucchini from the oven and let it cool slightly for a couple of minutes. The edges will be crackly, and the bottom will be a rich golden hue.
Serve the roasted zucchini slices warm or at room temperature, enjoying their crunchy texture and nutty aroma as a snack or side dish.