Heat oil in a heavy stockpot over medium heat. Add onions and garlic and saute for 5 min. Stir in green chile powder, tamari, cumin, salt, oregano and pepper and cook for another 2 min. Stir in broth, tomatoes, tomato paste, bell pepper, jalapeño pepper and hickory smoke flavoring. Cover and bring to a simmer over high heat. Lower heat to medium-low and continue cooking for 15 min. Add tortilla pieces and continue cooking until tortillas start to fall apart, about 5 to 10 min. Using an immersion or blender or food processor, puree soup until smooth and serve warm.
Serve with tortilla strips, cubed avocado pieces and sour cream. Will keep for 2 days in the refrigerator.