Boil 2 raw cups of uncooked wild rice in 4 cups of cold tap water. Bring to boil, reduce to simmer, cover with lid for 45 minutes on low simmer. Set aside to add as the last ingredient.
Sauté 1 large, sweet onion in ¼ cup of olive oil 3-5 minutes. Add 1 ⅕ cups chopped celery sauté 3-5 more minutes. I like to include the leaves.
Add two 32oz cartons of chicken stock (Kirkland Costco brand). Reserve 1 cup to mix with corn starch later.
Add ⅓ c + 1 Tbs (64g) of Knorr Chicken Bouillon, diced carrots, and sweet potato to stock pot. Taste for flavor, add the extra 1 tbs (16g) of Knorr granulated bouillon for a bolder flavor. Bring to a low boil for 8-10 minutes to soften carrots. Be careful cutting the sweet potato, they are awkward and firm.
Prepare the roast chicken: While your vegetables are softening on a low boil prepare your chicken. Remove both breasts, chop into uniform bite size cubes, about 1” x 1”. By the time you are finished with this step your carrots and sweet potatoes will be soft in the hot broth. We are almost ready to bring all the components together.
Whisk together 1 cup of cold or room temp broth and 3 tbs of corn starch, add to low boiling broth. This will thicken your soup while allowing it to be gluten free. Stir, while watching for thickening. Feel free to add more corn starch for a thicker texture (always thin in a liquid like water or broth to avoid lumps).
Add your prepared wild rice and rotisserie chicken (Costco). Turn heat down or off.
Lastly, add 2 cups of heavy cream to finish off your soup. Voila! It is ready to serve.