01 -
Heat olive oil in a large cast-iron skillet over medium-high heat. Once hot, add the chuck roast and sear each side until nicely browned, about 3-5 minutes per side.
02 -
Transfer the seared beef to a slow cooker. Sprinkle with bouillon powder and pour the enchilada sauce over top. Cover and cook on low for 10 hours, until the meat becomes tender enough to easily pull apart.
03 -
Remove the cooked roast from the slow cooker. Using two forks, shred the meat completely. Return the shredded beef to the slow cooker and mix it with the cooking juices.
04 -
Preheat a skillet over medium-high heat. Butter one side of each slice of Texas toast.
05 -
Place bread slices butter-side down in the skillet. Layer each with ½ cup shredded beef, 1 tablespoon diced onion, ¼ cup queso fresco, ¼ cup mozzarella, and a sprinkle of cilantro. Top with another slice of bread, butter-side up.
06 -
Lower heat to medium-low and cook for 5-7 minutes until golden. Carefully flip each sandwich and cook another 5-7 minutes until crispy and the cheese is completely melted. Remove with a spatula and serve hot.
07 -
Serve sandwiches with a small bowl of the leftover cooking juices for dipping – this is the traditional way to enjoy birria!