01 -
Place the chuck roast, Roma tomatoes, onion, whole garlic head, salt, and bay leaves into the slow cooker. Pour in 1.5 litres water, cover with the lid, and set to high for 6 hours or low for 8 hours.
02 -
Once the meat has cooked 4 hours (high) or 6 hours (low), prepare the sauce. Using gloves and scissors, cut open all chiles and remove stems and seeds. Place chiles in a bowl and cover with boiling water. Let soak uncovered for 20 minutes, using a small plate to weigh down if necessary.
03 -
Toast the cloves, cinnamon stick, Mexican oregano, cumin seeds, thyme, peppercorns, and bay leaves in a dry pan over medium-high heat for 1–2 minutes, stirring constantly until fragrant. Transfer toasted spices to a blender.
04 -
Brown the 4 garlic cloves in the same pan, turning to brown all sides. Add browned garlic to the blender.
05 -
Ladle 500 ml of beef broth and the two cooked tomatoes from the slow cooker into the blender. Drain soaked chiles and add to the blender. Blend until a completely smooth sauce forms.
06 -
Add vinegar and 1 teaspoon of salt to the blender. Blend briefly to incorporate.
07 -
Pour the chile sauce through a fine mesh strainer over a bowl, pressing with a spoon to extract clear liquid and remove solids.
08 -
When beef is tender, remove meat from the cooker and shred with forks. Discard the garlic head from the broth.
09 -
Stir the strained chile sauce into the beef broth in the slow cooker. Return the shredded meat to the pot, mix well, and continue cooking for 1 further hour.
10 -
Serve birria in bowls topped with chopped onion, cilantro, radish slices, and lime wedges. Enjoy with warm corn tortillas.