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Prawns and Cos Stir-Fry

This vibrant prawn and romaine stir-fry is a fantastic high-protein meal that proves lettuce is for far more than just salads. By briefly searing the gem-like romaine hearts in a hot frying pan, they take on a lovely charred edge while retaining a refreshing crunch. Combined with succulent prawns, fiery ginger, and a hint of chilli, this dish offers a sophisticated balance of textures and savoury flavours that feels remarkably light yet satisfying.

Perfect for a busy weekday evening, this nutritious stir-fry comes together in less than fifteen minutes from pan to plate. The savoury soy and rice vinegar sauce provides a glossy coating that ties the seafood and greens together beautifully. Serve it immediately over a bed of fluffy white rice for a wholesome, homemade dinner that is both calorie-conscious and packed with lean protein.

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Ingredients for Prawns and Cos Stir-Fry

  • 80ml reduced-sodium chicken broth

  • 45ml soy sauce

  • 2 tablespoons rice vinegar (not seasoned)

  • 1 tablespoon sugar

  • 1 1/2 teaspoons cornflour

  • 1/2 teaspoons dried hot red-pepper flakes for stir-fry

  • 3 tablespoons vegetable oil

  • 5 garlic cloves, forced through a garlic press

  • 1 tablespoon finely chopped peeled fresh ginger

  • 575g peeled and deveined large prawns (about 21 to 25 per pound), patted dry

  • 2 cos hearts, cut crosswise into thirds

  • Accompaniment: white rice

Stir together all sauce ingredients in a small bowl.

Heat oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then stir-fry garlic and ginger until fragrant, about 30 seconds. Add prawns and stir-fry until almost cooked through, about 3 minutes. Add half of cos and stir-fry until it begins to wilt, then add remaining cos and stir-fry until just wilted and prawns are just cooked through, about 1 minute. Stir sauce, then add to stir-fry and simmer, stirring, 2 minutes.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 28 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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