Leftover Thanksgiving Soup

INGREDIENTS

• 2 celery ribs, sliced
• 1 carrot, sliced
• 1 cup chopped onion
• 1/4 cup butter
• 3 (14 ounce) cans chicken broth
• 2 cups water
• 1 teaspoon garlic powder
• 1/2 teaspoon thyme
• 3 cups cooked turkey
• 1 (12 ounce) jar turkey gravy
• 1/4 cup left over prepared stuffing
• 1/4 cup left over mashed potatoes
• 2 tablespoons cranberry sauce (the jellied kind)
• 1 cup pearl barley