Originally a poor man’s dish, soupe de poisson à la rouille is a classic French soup and a close cousin of the famous bouillabaisse.

The soup is usually prepared with white fish that is cooked in a flavorful broth that mostly incorporates tomatoes, olive oil, garlic, saffron, and various herbs. The soup is then strained and served with rouille, a classic Provençal sauce that usually incorporates bread, garlic, spices, egg yolks, and olive oil while some versions can also include monkfish liver, tomatoes, or potatoes.

Soupe de poisson originated in the Provençal region, most probably in Marseille, and it can be found all along the French Mediterranean coast. It is often enjoyed as an appetizer, typically served hot and topped with crunchy croutons and Gruyère cheese.