01 - Preheat grill or grill pan to medium-high heat, approximately 400°F.
02 - In a large bowl, combine zucchini slices with olive oil, sea salt, black pepper, and garlic powder. Toss thoroughly to ensure even coating.
03 - Place zucchini slices in a single layer on the hot grill. Cook for 4 to 5 minutes per side until distinct grill marks develop and the zucchini is tender yet retains structure.
04 - Immediately transfer grilled zucchini to a serving platter. While warm, sprinkle evenly with grated Parmesan cheese so it begins to soften.
05 - Scatter chopped basil, parsley, and chives generously over the top.
06 - Serve directly while warm or let cool to room temperature before serving.