Preheat the oven to 200° C, 400° F, gas mark 6. Place the piece of brisket in a large cast iron casserole (dutch oven), add the tomatoes, onion, garlic, salt, bone marrow (optional) and cover with water, put the lid on.
Place the casserole in the oven and cook the brisket to 200° for 20 min. Then lower the temperature to 150° C, 300° F, gas mark 2 and cook for 2 hrs or until the brisket is very tender. Make sure that it does not ran out of water. The water will become the consome for the birria.
Once the brisket is tender and the broth still hot, place the guajillo chillies that have been previously cleaned, deseeded and stem of, in the broth for 15 minutes to soften. If you cook the brisket the day before, just heat the meat again in low on the hob and then place the guajillos.
While the guajillos are softening, take the brisket out and remove the fat, then shred with the help of two forks, this step should be very easy, as the brisket should be very tender.
Once the brisket has been shredded, chop it slightly to avoid having long bits of brisket. Set aside.
By now, remove the bone marrow and discard or leave them in the stock and have them with the birria.
When the guajillos are soften, remove them from the broth and place them in a high speed blender, then add the tomatoes, onion, garlic and all the spices (dried, oregano, cloves, cinnamon, etc), add two laddles of broth and blend until getting a very smooth sauce.
Pass this sauce through a sieve and add it to the broth, then add the shredded brisket and cook for 15 minutes to low/medium heat. Let it simmer gently. Check if it need more salt. If it does, add some.
There are a few ways to eat birria: 1. In a bowl with some broth, coriander, onion, spicy salsa and lime juice.2. In a taco, put some shredded brisket in a taco, add some pinto beans (optional), fresh coriander, chopped onion, spicy salsa and a squeeze of lime.3. In a quesabirria, heat a tortilla on a non-stick frying pan, add the mozzarella cheese on top of the tortilla and some birria brisket. Take the quesabirria and drench it in the birria broth and place on the frying pan to finish of. Add coriander, onion, spicy salsa. My favourite way!
Enjoy this lovely recipe with some freshly cooked pinto beans and some cervecitas. Share it with some friends and family.