Creamy Chicken and Rice Soup

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Stewart Estate in Quinlan, Texas in 1994.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 cup sliced mushrooms
 * ¾ cup white onion chopped
 * ½ cup butter
 * ½ cup flour
 * 4 cups half and half
 * 3 cups chicken broth
 * 2 cups diced cooked chicken
 * 2 cups frozen chopped broccoli thawed
 * 1½ cups cooked brown rice
 * ½ teaspoon dried rosemary
 * ½ teaspoon salt
 * ¼ teaspoon dried thyme
 * ¼ teaspoon pepper

Directions

 * 1) Sauté mushrooms in butter until tender then add flour and stir until smooth.
 * 2) Cook 1 minute stirring constantly.
 * 3) Gradually add half and half and chicken broth then cook over medium heat stirring constantly until thick and bubbly then stir in remaining ingredients.
 * 4) Cover and simmer 10 minutes stirring occasionally.