- 1 pound boned, skinned chicken breasts
 - 2 fresh poblano chilies (also called pasillas)
 - 1/2 cup chopped onion
 - 8 cups fat-skimmed chicken broth
 - 6 (6 inch) corn tortillas
 - 1/4 cup lime juice
 
- Rinse chicken; cut into 1-inch chunks.
 - Rinse chilies, then trim and discard stems, seeds, and veins. Cut chilies lengthwise into 1/8- to 1/4-inch strips.
 - In a 4- to 5-quart pan over high heat, bring chilies, onion, and broth to a boil. Reduce heat, cover, and simmer 5 minutes. Add chicken, cover, and simmer until meat is no longer pink in center of thickest part (cut to test), about 4 minutes.
 - Meanwhile, cut tortillas into 1-inch squares. Divide squares equally among wide soup bowls.
 - Ladle soup over tortillas. Add lime juice to taste.