Arepas are a type of corn cake popular in both Venezuela and Colombia. Pique boricua (also known as pique de piña), a chilli- and pineapple-flavoured vinegar, is Puerto Rico's answer to Tabasco. You'll need to begin this recipe at least three days ahead.
Note Canned tomatillos are available from select delicatessens. Coconut vinegar is available from Asian grocers. Masarepa is a pre-cooked cornmeal flour; it's available from Latin Deli, The Essential Ingredient and select delicatessens.