Prepare rice according to package directions. Cook onions in Dutch oven or large saucepan coated with cooking spray over medium-high heat until tender.
Add broth, cooked rice, tomatoes, chicken, and chilies.
Reduce heat; cover and simmer 20 minutes. Add lime juice. Just before serving, pour into soup bowls, top with tortilla strips and avocado. Garnish with lime slices and cilantro.
A hearty mixture of tomatoes, chicken, lime juice, tortilla chips, avocado in a savory chicken broth and topped with lime slices and cilantro.