Fall Chicken and Vegetable Chowder

Name: Fall Chicken and Vegetable Chowder
Ingredients: 2 tablespoons olive oil; 1 medium onion, diced; 1 cup diced celery; 12 to 16 ounces diced chicken and apple sausage (or another kind of sausage); 3/4 cup apple cider; 2 1/2 cups chicken broth; 1 cup diced carrot; 2 cups diced potato; 1 cup diced cooked chicken; 1 cup fresh or frozen corn kernels; 2 1/2 cups half-and-half or whole milk; 1/2 cup all-purpose flour; 2 cups shredded cheddar cheese; 1 tablespoon fresh chopped parsley, or 1 teaspoon dried parsley flakes; Salt and pepper, to taste