In large bowl, toss beef with Adobo seasoning to coat; set aside.
In medium saucepan set over medium-high heat, bring 4 cups water to a boil. Add ancho chiles, pasilla chiles and tomato. Reduce heat to medium-low and simmer, stirring occasionally, until chiles soften, about 5 minutes. Using slotted spoon, transfer solids to blender. Reserve cooking liquid.
To the blender, add bouillon, yellow onion, garlic, cumin, oregano and vinegar. Add 1 cup reserved cooking liquid and blend; add more cooking liquid as needed to achieve a smooth paste constistency.
In large saucepan set over medium-high heat, add oil until shimmering. Add chile mixture and bring to a simmer. Add seasoned beef, bay leaves, cinnamon stick and 4 cups water. Bring to a boil, then cover, reduce heat to a simmer and cook, stirring occasionally, for 2 1/2 to 3 hours or until beef is tender. Discard bay leaves and cinnamon stick.
Using slotted spoon, transfer beef to cutting board and finely chop or pull apart using two forks.
To medium bowl, transfer rendered fat from top of the saucepan. Dip a tortilla in rendered fat, then place in large skillet set over medium heat. Top half of tortilla with 1/4 cup beef mixture. Fold taco over filling, pressing down with spatula to help flatten. Cook, turning once, for 2 to 3 minutes or until lightly browned and crispy. Repeat with remaining tortillas and remaining beef mixture.
Serve with a bowl of the broth topped with onions and cilantro on the side for dipping.