Quick “Pickled” Onion: In a medium bowl, combine the thinly sliced red onion, red wine vinegar, salt, and sugar. Toss to coat. Leave at room temperature and toss every 5 minutes or so while preparing the rest of the meal.
Heat the oil in a large skillet. Once oil is warm, add in the thinly sliced sweet onion and garlic. Sauté for 4–6 minutes or until tender, stirring occasionally (nothing should be burning/browning; lower the heat if it is). Add tomato paste and all the seasonings: ground cumin, dried oregano, chicken bouillon powder, paprika, dried coriander, and salt and pepper to taste. (I add 3/4 teaspoon salt and 1/4 teaspoon pepper.) Toast seasonings for 1 minute, stirring constantly. Again, lower the heat if anything is burning.
Add crushed tomatoes and cook for 1 minute. Lastly, add chipotle peppers and sauce (see note 1). Stir and heat for 30 more seconds. Bring to a simmer, reduce heat to low, and simmer for 6–8 minutes.
Transfer the sauce mixture to a large blender and process until completely smooth (see note 2). Pour the mixture back into the skillet. Add the rotisserie chicken and gently stir to coat the chicken and warm it through. If desired, stir in 1 tablespoon fresh lime juice.
Quick “Guac”: While sauce is simmering, I like to whip this up: Place a large, ripe avocado in a small bowl and mash with a fork. Add in a pinch of salt and pepper and a few squeezes of lime juice. Mash together and set aside.
Spray both sides of the tortillas with cooking spray and char the tortillas directly over the gas flames for a few seconds. Use tongs to flip until tortillas are lightly charred and soft. Immediately fold the tortilla in half (so it will fold into a taco nicely later) and set aside.
Spread the guac in the center of the charred tortillas. Top with a scoop of the chicken and some pickled red onions. Add your other favorite taco toppings such as some queso or cotija cheese, some fresh cilantro, and another squeeze of fresh lime juice.
Notes
Note 1: Optional toppings: cilantro, cotija cheese (or queso fresco), large avocado, and additional lime juice.Note 2: Here’s a general guideline for how much of the chipotles to add:
Little to no spice: Use 1 tablespoon sauce surrounding the chipotle peppers.
Lightspice: Use 1 tablespoon sauce surrounding the chipotle peppers and 1 tablespoon peppers.
Medium spicy: Use 1 tablespoon sauce surrounding the chipotle peppers and 2 tablespoon peppers.
Spicy: Use 1 tablespoon sauce surrounding the chipotle peppers and 3 tablespoons peppers.
(If all the peppers are large (or larger than a tablespoon measuring spoon), chop the peppers to fill the measuring spoon).
See blog post for how to store leftover chipotle peppers.
Note 3: When blending hot sauces, the escaping steam could pop the top off the blender if it’s too full. If you’re concerned about this, replace the blender lid with a folded kitchen towel. Because it’s not airtight, the towel will absorb the steam—and the splatters!Storage: Store leftover Chicken Tinga in an airtight container in the fridge for up to 4 days. Keep tortillas, toppings, and sauce separate for the best texture. Reheat chicken on the stove or in the microwave, adding a splash of broth if needed.