1. In large, deep saucepan, heat oil over medium. Add onion, celery, carrots, bell pepper & garlic. Cook stirring, until vegetables are softened, about 7 minutes. Add chili powder & chipotles. Cook stirring, 1 minute.
2. Add tomatoes with juices & stock. Bring to boil. Season to taste with salt & pepper. Add quinoa, beans and corn. cook stirring until mixture returns to boil. Reduce heat to low and simmer until quinoa is tender about 25 minutes.