In a 6-qt. stockpot, heat oil over medium-high heat. Add chicken and onion; cook and stir 2-3 minutes or just until onion is tender., Stir in squash, barley, seasonings and broth; bring to a boil. Reduce heat; simmer, covered, 10-12 minutes or until barley is tender., Add beans, corn, cream, salsa and cilantro; heat through, stirring occasionally. If desired, serve with avocado and tomatoes.