I made this soup several times in 2010.  It's one of my favorite recipes.  I usually make it early in the week and have a bowl every day for lunch through the work week.  It's as good the first night I eat it as it is on day #4.  I usually top with some shredded cheese and a spoon full of sour cream (and you can use low fat and you don't miss it).  This is very flavorful.

Weight Watchers Taco Soup
Group Recipes

1 lb ground turkey
1 large onion, chopped
1 (1 oz) package Hidden Valley Ranch Dressing Mix
1 (1 oz) package Taco Seasoning Mix
1 can pinto beans
1 can chili beans (either hot or regular)
1 can whole kernel corn
1 can Mexican-style tomatoes
1 can diced tomatoes (any flavor)

Brown meat and onions and drain.  Mix ranch and taco seasonings into meat.  Add rest of the ingredients, undrained, to the mixture.  Simmer 1 hour.