In a Dutch oven, brown chicken and onion in butter until chicken is no longer pink. Add garlic; cook 1 minute longer. Add the water, bouillon and cumin; bring to a boil. Reduce heat; cover and simmer for 5 minutes. , Stir in the cream, cheese, corn, chiles and hot pepper sauce. Cook and stir over low heat until cheese is melted; add tomato. If desired, top with cilantro and tortilla strips.