One of my favorite “grown in Hawaii” products at Costco is Hamakua Mushrooms. Sold in an 8 oz. container, the Pleurotus eryngii (a.k.a. King Trumpet Mushroom, King Oyster Mushroom, or Ali’i Oyster) is the largest of the oyster mushrooms. Not only are they beautiful (look at that picture above!), but they taste great when cooked and are quite popular among vegetarian and vegan recipes.