Go read the linked story to learn how this ubiquitous green-capped hot-sauce began, and how Vietnamese immigrant David Tran's small family business grew into a multimillion dollar enterprise.
Most people who buy it don't even know how to pronounce it's name! I didn't, until I read the article (It's "SIR-rotch-a"). Everyone calls it Rooster Sauce, after the picture of a rooster on the label.
Although it began as a family recipe meant as a condiment for Pho, or Vietnamese beef noodle soup, Rooster Sauce is really a multicultural phenomenon. A puree of red jalapenos, garlic, vinegar, sugar and salt, it's an L.A. take on a Tran family recipe. He began selling it to Vietnamese and other Asian restaurants, to satisfy the common taste for a little hotness in many Asian cuisines. Great taste and a great price helped it's popularity spread to chile-lovers from other cultures.
In L.A. you can find Rooster Sauce on almost any restaurant table.
People are using it on everything. Spicy remoulade, seared tuna steak, hollandaise sauce, even Buffalo chicken wings! It has a Facebook page! People blog about it!
I love it best with a nice bowl of Pho. I like to mix a little Sriracha and hoisin sauce together to dip the slices of rare steak up from the steamy broth. Yum! Get the Rooster!