Fish Sauce with Lemon, Parsley, & Tomato

This fish pasta sauce is the kind of light, bright Mediterranean preparation that lets the seafood speak for itself. Chunks of turbot (or halibut or whiting) simmer gently in olive oil with shallots, chopped tomatoes, fish stock, thyme, and basil until just opaque, then get finished with a hit of lemon zest, lemon juice, and fresh parsley right before tossing with hot pasta.

The cooking time is deliberately brief. Seven to eight minutes in the sauce is all the fish needs. Turbot and similar white fish fillets go from perfectly flaky to tough and dry in just a few extra minutes, so watching the clock here matters more than with heartier proteins.

Lemon rind and juice added at the very end preserve their bright, fresh zing. Cooking citrus too long mutes the flavor and can turn it bitter. That last-minute addition means every bite has a pop of lemon that cuts through the olive oil and lifts the tomatoes and herbs.

Kitchen Tips

• Cut the fish into even chunks. Uniform pieces cook at the same rate. Mismatched sizes mean some pieces are overcooked while others are still raw.
• Don’t stir too aggressively. Fish breaks apart easily. Gently fold the sauce rather than stirring vigorously once the fish goes in.
• Add lemon at the end. Cooking lemon juice dulls its brightness. A last-minute addition keeps the sauce tasting fresh and vibrant.
• Use good olive oil. With so few ingredients, the quality of the oil is noticeable. This isn’t the time for bargain-bin olive oil.

Variations

• Shrimp or scallops instead of turbot for a different seafood option. Reduce cooking time to 4 to 5 minutes.
• Add capers with the tomatoes for an extra briny, salty punch.
• White wine splash: Deglaze the shallots with a splash of dry white wine before adding the stock for more complexity.