Prepare 1 cup brown rice according to package directions.
Meanwhile, in a large skillet or wok, sauté chicken, carrots, garlic, chopped scallions and red bell pepper in oil until chicken is opaque and white, about 4 minutes, stirring constantly.
Add soy sauce, celery, leftover veggies, white pepper and cilantro.
Mix all ingredients together, cover and simmer for 5 minutes.