A Gumbo Recipe In Memoriam

Name: A Gumbo Recipe In Memoriam
Ingredients: 1 1/2 cups unsalted butter (3 sticks); 2 cups all-purpose flour; 1 red bell pepper, diced; 1 green bell pepper, diced; 1 medium yellow onion, diced; 1 stalk celery, diced; 2 1/2 quarts chicken stock, heated; 1 tablespoon Creole Seasoning; 1/2 teaspoon ground black pepper; 1/2 teaspoon crushed red pepper; 1/2 teaspoon chili powder; 1/2 teaspoon thyme; 1/2 tablespoon chopped garlic; 1 bay leaf; 1 tablespoon kosher salt; pound andouille sausage, sliced ½-inch thick; 1 pound chicken, cooked & chopped into bite-sized pieces; 1 pound raw shrimp, peeled & deveined