Zucchine Grigliate
Grilled zucchini — the reliable summer side dish
Zucchini sliced lengthwise at 5–7 mm, grilled over high heat until golden with deep grill marks, dressed warm with olive oil, garlic, parsley, and an optional squeeze of lemon. In Campania grilled zucchini rarely appears alone — it is part of the summer table alongside tomatoes, mozzarella, olives, and bread, a simple component of a larger abundance.
Grilled zucchini is one of the most reliable dishes of the southern Italian summer: fast, requires almost no skill once the heat is right, and improves across a range of occasions from quick weeknight side dish to antipasto component to preserved-in-oil preparation that lasts several days. The only real requirement is a very hot grill surface and zucchini that is not too thin. At the correct thickness — 5 to 7 mm — the exterior chars and marks while the interior becomes tender and slightly sweet. Below 5 mm the zucchini dries and turns limp before it can develop any character; above 10 mm it takes too long and the surface burns before the center is done.
The resting period after dressing is the step most people skip and should not. Dressed warm and left for 10–15 minutes, the zucchini absorbs the olive oil and garlic from within as it cools and contracts. The result is a cohesive dish rather than zucchini with oil on top. If you are making it to serve the next day — preserved in a jar with olive oil, herbs, and garlic — this same principle applies on a longer timescale: overnight in olive oil, the zucchini becomes something substantially better than it was when it came off the grill.
Zucchini contains approximately 95% water — more than almost any other summer vegetable. At high grill temperatures, this surface water evaporates rapidly, allowing the Maillard reaction to proceed at the contact points and produce the flavor compounds responsible for the characteristic grilled character. If the grill is not hot enough, the water evaporates too slowly and the surface steams rather than chars; the result is pale, soft, and relatively flavorless. The olive oil brushed on before grilling serves two functions: it conducts heat more evenly across the zucchini surface, and it provides a thin protective layer that delays water loss slightly, buying the surface time to develop color before drying out entirely.
The preservation-in-olive-oil method works by anaerobic protection: submerged in oil, the zucchini is isolated from oxygen and the microbial activity that requires it. The oil also continues to carry flavors from the herbs and garlic into the zucchini during storage, deepening the infusion that begins during the initial dressing. Stored in a clean jar and refrigerated, oil-preserved grilled zucchini keeps for 3–5 days and improves for the first two of them.
The recipe
To preserve in olive oil: after grilling and while still warm, layer in a clean jar with garlic, fresh herbs (basil, mint, or oregano), and enough olive oil to submerge. Close, refrigerate, and serve within 3–5 days. Bring to room temperature before eating.
Buon appetito.
