Chicken Creole Gumbo

Name: Chicken Creole Gumbo
Ingredients: ¾ cups Butter; ½ pounds Onion, finely chopped; ½ pounds Green Bell Pepper, Finely Chopped; ¼ pounds Celery, Sliced Thin; 2 cloves Garlic, Minced; 2 Tablespoons All-purpose Flour; 2 cans Chicken Stock Or Broth (15 Oz. Cans); 1 pound Slant-cut Sausage, Sliced And Then Quartered; 2 pounds Cooked Chicken, Shredded Or Diced; 2 cans Crushed Tomatoes (25 Oz. Cans); ½ Tablespoons Dried Oregano; ¼ teaspoons Freshly Ground Black Pepper; ¼ teaspoons Cayenne Pepper; ¼ teaspoons Dried Thyme; ¼ teaspoons Dried Basil; 1 Bay Leaf; Salt To Taste; 12 Hard Boiled Eggs, Peeled; ⅓ cups Fresh Parsley, Chopped