Maui Onion Garlic Mustard - Maui onions from Kula are the base for our Maikai Maui Onion Garlic Mustard. Known around the world as one of the flavorful onions grown, our Maui's are mixed with a combination of pungent spices to create unique mustard that you can use on meats, poultry, seafood, and sandwiches. Our mustard has no artificial sweeteners or preservatives.