1. Combine first 3 ingredients; sprinkle evenly over chicken thighs.
2. Heat oil in a large nonstick skillet over medium-high heat. Add chicken thighs, and cook 3 minutes on each side or until browned; remove from pan, and set aside.
3. Add onion, celery, and poblano to pan; cook 6 minutes. Add garlic; cook 1 minute. Add broth and water; bring to a boil, and stir in rice. Return chicken to pan; cover, reduce heat, and simmer 15 minutes or until liquid is absorbed and chicken is done. Remove from heat; let stand 5 minutes.