Mezzetta® Imported Martini Olives start with the finest Spanish Queen olives, which are large and meaty and ideal for stuffing with bright red Spanish pimientos. It’s a laborious process but hey, we think a great martini is worth it. Mezzetta enjoys longstanding relationships with the very best growers in Spain, which means that they have our pick of the highest quality olives available. Olives are imported to Mezzetta's state-of-the-art manufacturing facility in Napa Valley, California, where they are packed in a vermouth-infused brine. Verified non-GMO. Certified gluten free.