Spicy Turkey Gumbo

Name: Spicy Turkey Gumbo
Ingredients: 2 tablespoons vegetable oil; 8 ounces andouille sausage, sliced into 1/8 inch thick rounds; 2 cups diced onions; 2 teaspoons kosher salt, plus more to taste; 1 cup chopped green bell pepper; 1 1/2 cup sliced celery; 1 teaspoon freshly ground black pepper; 1/2 teaspoon cayenne pepper, or to taste; 2 tablespoons all-purpose flour; prepared brown roux; 8 cups turkey or chicken broth; 1 1/2 pounds cooked turkey meat, cut into bite-sized pieces; 1/2 cup sliced green onions; 1/4 cup chopped Italian parsley