Cost Rican chilera is a fermented vinegar and vegetable sauce that is a little bit spicy due to the Tabasco flavoring. The chilera is often homemade (although you can find it in grocery stores now).
This Puerto Rican chef swears by this ingredient especially when making onion steaks, like the notable Puerto Rican dish known as bistec encebollado, which is marinated in onions and vinegar before ...