Slow Cooked Barbacoa Beef Tacos

Name: Slow Cooked Barbacoa Beef Tacos
Ingredients: 3 Pounds chuck beef; 2 Tablespoons vegetable oil; 6 cloves garlic; 1 large onion; 2 Teaspoons ground cumin; 2 Teaspoons dried Mexican oregano (use regualr oregano is unable to the Mexican version); 1/2 Teaspoon ground cinnamon; 3 roma tomatoes; 3 chipotle chiles in adobo sauce; 1/4 cup tablespoons cider vinegar; 2 1/2 Cups water; 2 beef bouillion cubes; 1 handful of cilantro, roughtly chopped; 6 palm sized torillas (corn or flour); Lime for garnish; Salt and Pepper to taste