Wash the zucchini and trim off both ends. Because very large zucchini can have tougher skin, peel most of the skin away. You can leave a few narrow strips of skin if you like. Cut each zucchini in half lengthwise.
Use a spoon to scoop out the large seeds, or a knife to cut out the large seeds and the soft, spongy center. You don't have to remove every bit of the center, but removing the watery, seedy portion will give you firmer zucchini pieces after roasting.
You don't have to remove every bit of the center, but removing the watery, seedy portion will give you firmer zucchini pieces after roasting.
Cut the zucchini: Cut the zucchini into approximately 1-2-inch chunks or thick half-moon pieces.
Try to keep the pieces relatively similar in size so they roast evenly.
Place the cut zucchini on a large baking sheet and gently pat it dry with paper towels.
This little step is especially helpful when using large garden zucchini, which can contain quite a bit of moisture.
Season the zucchini: Drizzle the zucchini with olive oil. Add the minced garlic, salt, black pepper, and Italian seasoning. Mix everything together until the zucchini is evenly coated.
Spread out the zucchini into a single layer. Try not to crowd the pan. If the zucchini pieces are packed too closely together, they will steam rather than roast, making it harder to get those delicious browned edges. If you're roasting a very large amount of zucchini, use two baking sheets rather than overcrowding one.
Preheat your oven to 425°F. Roast the zucchini for approximately 20–30 minutes, turning the pieces about halfway through cooking. The zucchini should be tender with golden brown edges.
Sprinkle the Parmesan cheese over the zucchini during the last 5 minutes of roasting. Return the pan to the oven and allow the cheese to melt and lightly brown, or add it before serving.
Remove the roasted zucchini from the oven and sprinkle with fresh parsley, if desired. Serve warm and enjoy!