- Heat vegetable oil in a medium saucepan over medium heat. Add onion and saute until soft, about 5 minutes.
- Stir in chicken with broth, 1 cup rice, ½ cup tomatoes, chili powder, and salt. Bring to a boil; reduce heat and simmer, covered, for 25 minutes.
- Stir in vegetables and let stand for 5 minutes.
- Spoon remaining tomatoes over the top and serve.