Heat a large skillet over medium heat. Chop the onion, then add it and the olive oil to the skillet and saute 4 minutes or until tender.
1 cup Sweet onion, 1 Tablespoon Olive oil
Mince the garlic, and add it to the skillet to cook until aromatic.
3 cloves Garlic
Chop and stir in the chipotle peppers and sauce, then the oregano and cumin. Toast for 1 minute.
3 Chipotles in adobo, 1 teaspoon Dried oregano, ½ teaspoon Cumin, 1 Tablespoon Adobo sauce
Add in the canned tomatoes with the juices, chicken stock, and salt. Simmer, and cook for 7-10 minutes.
15 oz Fire-roasted tomatoes, ¼ cup Chicken stock, ½ teaspoon Salt
Place the mixture in a blender and blend until totally smooth.
Return to the pan over low heat. Add in the shredded chicken, and cook for 5 minutes.
3 cups Shredded chicken
Place the chicken on warmed tortillas and top with avocado, cilantro, red onion, cotija cheese, or any toppings of choice.
Serve with lime wedges, and enjoy!