I tweaked several recipes and ideas from friends and came up with this easy dish. My kids love it, and so did about 30 ladies I served it to at a luncheon. The chicken can be cooked, diced, and frozen way ahead of time. The chicken needs to be thawed before assembling the recipe. I have used the lowest fat cream of celery & mushroom soups with success. If you can't find cream of onion soup, just substitute another cream soup. FYI: 6 cups diced cooked chicken weighs about 2 pounds.