Shrimp Étouffée

In a large frying pan or Dutch oven, heat the oil over moderate heat until almost smoking. Add the flour and whisk until it's the color of peanut butter, about 3 minutes. Whisk in the broth and continue whisking until the sauce starts to thicken, about 2 minutes.

Stir in the bell pepper, celery, onions, bay leaf, salt, cayenne, black pepper, and thyme. Bring to a simmer, cover, and cook over low heat until the vegetables are tender, about 15 minutes.

添加虾和葱and simmer until the shrimp are just done, about 3 minutes. Serve the étouffée over the rice.