De Birria is a traditional Mexican dish that consists of slow-cooked goat or beef in a flavorful broth. It is usually served with tacos, which is why the crossword solution for the term is 'Taco'. De Birria is a popular dish in Mexico and is often served at special occasions such as weddings and baptisms. It is also a popular street food in many parts of Mexico. The dish is typically served with a variety of accompaniments such as onions, cilantro, limes, and salsa.