https://www.simplyrecipes.com/recipes/shrimp_gumbo_with_andouille_sausage/
Ingredients
1/2 cup (120ml) peanut oil, or other vegetable oil
1/2 cup plus 2 tablespoons (90g) all purpose flour
1 green bell pepper, chopped
1 medium onion, chopped
3 celery stalks, chopped
4 garlic cloves, minced
1 tablespoon Cajun seasoning
1 quart (950ml) shellfish or chicken stock, plus 1 cup (236ml) water (see Recipe Note)
2 teaspoons Worcestershire sauce
8 to 12 ounces (225g to 340g) smoked andouille sausage, cut into 1/4-inch thick rounds
2 pounds (907g) shrimp, peeled and deveined
Salt and pepper to taste
3 to 5 green onions, white and green parts, chopped
1 tablespoon filé powder, optional
Hot sauce (such as Tabasco) to taste