Add the ketchup, horseradish and Worcestershire sauce; pulse to combine. Scrape into a serving dish and refrigerate at least 30 minutes or up to 4 hours. For the shrimp: Preheat the oven to 425˚.
Liu's dedication to sustainability is reflected in his use of everything, even the scraps, in his dishes. Sauces for his main courses are made from seafood by-products, and fermentation techniques ...