In a large saucepan, saute onion & chicken until done.
add remaining ingredients (except creams) and heat through
Remove from heat and add sour crfeam and whipping cream
Notes
You can substitute 8 oz. cream cheese for the sour cream. You can also substitute cooked cauliflower for the beans. I have also used rotisserie chicken that is already cooked. When doing so, I still saute the onions.