01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, toss the zucchini slices with olive oil, lemon zest, lemon juice, black pepper, salt, and garlic powder until evenly coated.
03 - Arrange the seasoned zucchini slices in a single layer on the prepared baking sheet, ensuring none overlap.
04 - Sprinkle the freshly grated Parmesan cheese evenly over each zucchini round.
05 - Roast in the oven for 18–20 minutes, until the zucchini is tender and the Parmesan is melted and lightly crispy. For extra crunch, broil for the final 1–2 minutes.
06 - Remove from the oven, transfer to a serving platter, and garnish with chopped fresh parsley. Serve immediately while hot.