What marinated ingredient is used in the Hawaiian ribeye dish?

The marinated ingredient used in the Hawaiian ribeye dish is pineapple. This choice is particularly significant as pineapple is not only a traditional ingredient in Hawaiian cuisine but also enhances the flavor profile of the dish. The natural sugars and acids in pineapple contribute to tenderizing the meat while imparting a sweet and tangy flavor that complements the richness of the ribeye. This particular pairing is well-known in various Hawaiian dishes, where fruit is often used in marinades to elevate the overall taste.

Pineapple's enzymes, specifically bromelain, also break down protein molecules, which further aids in tenderizing the meat during the marination process. This results in a delicious, juicy steak that's charred beautifully on the grill, typical of Hawaiian cooking styles focused on barbecue.

The other ingredients listed—chili, garlic, and mustard—while they may add distinct flavors to various dishes, are not characteristically associated with traditional Hawaiian ribeye preparations. Thus, pineapple stands out as the most fitting and culturally relevant choice for this dish.