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Romano beans with mustard vinaigrette and walnuts recipe

Romano beans with mustard vinaigrette and walnuts is a vibrant vegan dish that beautifully showcases the earthy flavours of fresh beans and crunchy walnuts. This recipe balances the crispness of tender romano beans with a zesty dressing made from Dijon mustard, red wine vinegar, and a hint of garlic. The addition of fresh parsley adds a touch of brightness, making it an ideal option for both warm weather dining and hearty winter meals.

Perfect for a light lunch or as a side at dinner, this dish is not only easy to prepare but also packed with nutrients. Rich in protein and healthy fats, the walnuts contribute to a satisfying texture, while the vinaigrette offers a refreshing burst of flavour. Serve it drizzled with extra-virgin olive oil for an added depth that enhances the overall experience.

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Ingredients for Romano beans with mustard vinaigrette and walnuts

  • 120 g walnuts

  • 1350 g romano beans or green beans, trimmed

  • 45 ml red wine vinegar

  • 30 ml dijon mustard

  • 1 garlic clove, finely grated

  • 30 ml extra-virgin olive oil, plus more for drizzling

  • 1/2 lemon, juiced

  • 90 g very coarsely chopped parsley

  • freshly ground black pepper

How to make Romano beans with mustard vinaigrette and walnuts

  1. Preheat the oven to 180°C (160°C for fan oven).

  2. Toast the walnuts on a rimmed baking tray, tossing once, until golden brown, about 8–10 minutes. Let cool, then coarsely chop.

  3. Cook the Romano beans in a large pot of boiling salted water until bright green and tender, about 8–10 minutes. Using a slotted spoon, transfer the beans to a bowl of ice water and let cool. Drain and pat dry.

  4. Meanwhile, mix the vinegar, mustard, garlic, and 30 ml of oil in a large bowl to combine. Let the mixture sit for 10 minutes to allow the flavours to develop.

  5. Add the walnuts and Romano beans to the dressing. Finely zest the lemon over the beans and add the parsley. Season with salt and plenty of pepper, then toss to coat.

  6. Transfer the mixture to a platter and drizzle with a little more oil before serving.

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.

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Article history

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

  • 7 Aug 2025 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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