Add the olive oil to a skillet and heat.
Once warm, add in the onion and saute for about 4 minutes.
Add in the garlic and cook for an additional 1 minute.
Stir in the chipotle peppers, oregano, and cumin. Cook for about 1 minute.
Add in the tomatoes, chicken broth, and salt. Cook for about 10 minutes.
Place mixture into blender and blend on high for 30 seconds.
Return mixture to the skillet and add in the chicken. Add more salt if desired.
Remove chicken from heat and assemble into tortilla shells with garnishes of choosing.
Enjoy!