Step 1

In a large skillet, heat the olive oil over medium-high. Add the onion, chili powder, salt, and cumin. Sauté until the onion is softened, about 5 minutes.

Step 2

Stir in the garlic and let cook for 30 seconds.

Step 3

Add the shredded chicken, chipotle peppers, diced tomatoes, and lime juice. Let cook, stirring every minute or two, until the chicken is heated through, about 5 minutes. Taste and adjust seasoning as desired.

Step 4

To serve: Fill the shells or warm tortillas with the chicken and add any desired toppings. Enjoy immediately.