01 - Set your grill to medium-high heat, targeting approximately 400°F. Allow the grates to heat thoroughly for optimal charring.
02 - In a large bowl, toss the zucchini rounds with olive oil, sea salt, black pepper, and garlic powder until every slice is evenly coated.
03 - Arrange the seasoned slices in a single layer directly on the hot grill grates. Cook for 4 to 5 minutes per side until distinct grill marks develop and the zucchini is tender yet still holds its shape.
04 - Using tongs, carefully remove the zucchini from the grill and arrange on a serving platter while still hot.
05 - While the zucchini is still warm, sprinkle the grated Parmesan cheese evenly across the top so it softens and begins to melt from the residual heat.
06 - Scatter the chopped basil, parsley, and chives over the cheesy zucchini slices for a bright, fresh finish.
07 - Present immediately while warm, or allow to cool to room temperature. This dish holds up well either way.