This is a recipe for pique boricua or pique de piña. It is a puertorrican recipe for a hot pineapple flavored vinegar that can be used to make any meal hot. It tastes great on top of rice and beans. This is a great way to use the pineapple skin before it is dumped on your compost pile. I need to warn you that it is very hot and you may use a little bit at a time.