Cut chicken breasts into bite-size pieces. Set aside.
Preheat skillet over medium heat. Place tortillas in skillet and toast 8 - 10 minutes or until light brown. Remove from skillet and cool.
In roaster over medium heat, combine chicken broth, onions, chili peppers, oregano, ¼ teaspoon lime zest, 2 tablespoons lime juice, black pepper and garlic. Bring to a simmer. Reduce heat to low and cook 5 minutes.
Stir in chicken and cover. Increase heat to medium. When Vapo-Valve™ clicks steadily, reduce heat to low and cook 7 - 9 minutes or until chicken is tender.
Stir in tomatoes and cover. Heat thoroughly.
When ready to serve, sprinkle with parsley or cilantro. Top individual servings with tortilla strips.