Birria Tacos

Step 1

Put the short ribs in a large heavy pot. Season with 3 teaspoons salt and cover with water by about 1 inch. Bring to a boil over medium heat, skimming any foam from the surface. Reduce the heat to low and simmer until the meat is tender, 2 hours, 30 minutes to 3 hours. Transfer the short ribs to a cutting board with a slotted spoon and let cool slightly, then shred the meat from the bone. Skim the fat off the broth in the pot; reserve the broth.

Step 2

Meanwhile, soak the dried chiles in warm water until soft, about 30 minutes. Drain and transfer to a blender; add the tomatoes, onion, garlic, peppercorns, achiote paste and cumin and process until smooth, adding water if necessary.

Step 3

Mix about 1 cup reserved broth into the chile puree, then pour the puree through a fine-mesh sieve into the pot of broth. Bring to a boil, then reduce to a simmer and cook until thickened, about 30 minutes. Add the shredded meat and simmer 10 more minutes. Season with salt and pepper.

Step 4

Use tongs to divide the meat among the tortillas. Top with pickled onions; serve with the remaining cooking liquid and lime wedges.

Step 5

Pickled Red Onions

Step 6

Mix 1 thinly sliced large red onion, 3/4 cup each white vinegar and water, 6 tablespoons sugar and 1/2 teaspoon each crumbled oregano and salt in a large resealable plastic bag; seal and shake, then refrigerate at least 24 hours.