In 5-quart or larger pot, heat oil over medium heat. Add onions and sauté along with bell pepper, jalapeño and garlic. Cook until vegetables are tender.
In another container, combine water, chicken base, lime juice, sugar, cornstarch and seasonings. Add to vegetable mixture.
Add tomatillos and diced green chiles to pot; bring to boil. Add beans and chicken; simmer 10 minutes. Serve topped with cheese and sour cream if desired, with tortilla chips on the side.
Servings: 4 quarts