git add

Skip to main content

Roast Turkey Breast with Potatoes, Green Beans, and Mustard Pan Sauce

Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026

Meets Patient’s editorial guidelines

This roast turkey breast with potatoes and green beans is a sophisticated yet simple high-protein meal that makes the most of fresh, seasonal flavours. By roasting the turkey with a fragrant honey mustard and tarragon glaze, the meat stays succulent while developing a beautifully golden, savoury skin. The addition of baby potatoes and leeks creates a complete one-tray profile, making it an excellent choice for a nutritious Sunday lunch or an impressive midweek dinner.

Designed as a lean alternative to a traditional roast, this dish is packed with protein and vibrant vegetables. The French-style green beans are braised in chicken broth right on the baking tray, mingling with the cooking juices to create a natural, built-in mustard pan sauce. It is a well-balanced, wholesome meal that provides a comforting homemade feel without the need for complicated preparation or multiple heavy pans.

In this article:

Video picks

Continue reading below

Ingredients for Roast Turkey Breast with Potatoes, Green Beans, and Mustard Pan Sauce

  • Nonstick vegetable oil spray

  • 4 tablespoons honey mustard, divided

  • 5 tablespoons chopped fresh tarragon, divided

  • 40ml olive oil, divided

  • 1 1.0kg boneless turkey breast, net removed

  • 900g baby potatoes, halved

  • 300g thinly sliced leeks (white and pale green parts only

  • about 2 large)

  • 2 230g packages trimmed French green beans (haricots verts)

  • 240ml low-salt chicken broth

How to make Roast Turkey Breast with Potatoes, Green Beans, and Mustard Pan Sauce

Back to contents

Position 1 rack in top third and 1 rack in bottom third of oven and preheat to 218°C. Coat 2 heavy large rimmed baking sheets with nonstick spray. Whisk 2 tablespoons mustard, 2 tablespoons tarragon, and 1 tablespoon oil in small bowl. Place turkey breast, skin side up, on 1 prepared baking sheet; sprinkle all over with salt and pepper. Spread mustard mixture over skin. Roast turkey in bottom third of oven 45 minutes.

While turkey roasts, toss potatoes, sliced leeks, 1 tablespoon tarragon, and 1 tablespoon oil in large bowl. Sprinkle with salt and pepper; spread out on second baking sheet.

After turkey has roasted 45 minutes, place potatoes in top third of oven. Roast along with turkey until potatoes are tender, stirring potatoes occasionally, about 45 minutes. Remove potatoes from oven.

Toss beans with 1 tablespoon tarragon and 1/2 tablespoons oil in large bowl; sprinkle with salt and pepper. Spread beans around turkey; pour broth over beans. Continue roasting until thermometer inserted into thickest part of turkey registers 74°C and beans are crisp-tender, 10 to 15 minutes. Rewarm potatoes in oven 5 minutes.

Place potatoes and beans on platter. Slice turkey; place on same platter. Whisk 2 tablespoons mustard into turkey juices on sheet; season with salt and pepper. Spoon some juices over turkey; sprinkle with 1 tablespoon tarragon. Pass remaining juices.

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.

About the authorView full bio

Author image

UK recipe editors

About the reviewerView full bio

Author image

UK recipe editors

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
flu eligibility checker

Ask, share, connect.

Browse discussions, ask questions, and share experiences across hundreds of health topics.

symptom checker

Feeling unwell?

Assess your symptoms online for free

Sign up to the Patient newsletter

Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.

Please enter a valid email address

By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.