Braised Oxtail Ravioli
For the Oxtail Ravioli:
Preheat the oven to 250°C. Pat oxtails dry and sprinkle with salt and pepper. Heat oil and brown the meat in batches, turning occasionally, about 5 minutes per batch. Discard all but 1 tablespoon of the fat from the pot. Cook chorizo, onion, carrots, garlic, and bay leaf in the fat over moderate heat, stirring occasionally, until onion is softened. Add paprika and cook for an additional minute. Add wine and bring to a boil, stirring and scraping any caramelization off the bottom of the pot. Return the oxtails with any juices accumulated in bowl to the pot along with the tomatoes and bring to a boil. Put the covered pot in the lower third of the oven. Cook until very tender 3-3 1/2 hours, turning occasionally. Remove from oven and skim fat from the surface before stirring in the parsley, cilantro, vinegar, and soy sauce. Season to taste and allow to cool. Once cooled, remove oxtail meat from the bone and chop the oxtail meat in a food processor until smooth. Add the foie gras and truffle and process until smooth. Pass through a fine sieve, and refrigerate.
For the Sauce:
Reduce the stock by half and add the curry paste and puree. Continue reducing to sauce consistency. Season to taste and finish with the butter. Keep warm.
Place ½-ounce of oxtail filling in the center of the wrapper, brush the edges with egg wash, and cover with a second wonton wrapper. Seal tightly, ensuring there's no air in the ravioli. Cook in boiling water, drain, and serve with 1 tablespoon of sauce.