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Honey-Vinegar Leg of Lamb with Fennel and Carrots

This impressive honey-vinegar leg of lamb offers a sophisticated twist on the traditional Sunday roast. By marinating the meat in a vibrant paste of fresh parsley, garlic, and crushed fennel seeds, the lamb absorbs a deep, savoury flavour that perfectly complements the natural richness of the meat. The sweet and sharp glaze, made from a reduction of honey and red wine vinegar, creates a beautiful caramelised exterior during the final stages of roasting.

As a high-protein main course, this dish is both nutritious and satisfying, served alongside tender roasted fennel bulbs and sweet heritage carrots. The vegetables are roasted in the same juices as the lamb, ensuring every element of the plate is infused with flavour. It is an excellent choice for a family gathering or a festive celebration, offering a refined balance of herbal notes and subtle sweetness.

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Ingredients for Honey-Vinegar Leg of Lamb with Fennel and Carrots

  • 2 garlic cloves, chopped

  • 1 cup fresh flat-leaf parsley leaves

  • 1 tablespoon fennel seeds, crushed

  • 70g fennel fronds plus more for serving

  • 120ml olive oil, divided

  • Kosher salt, freshly ground pepper

  • 1 7–4.1kg bone-in leg of lamb, tied

  • 120ml red wine vinegar

  • 80ml honey

  • 4 fennel bulbs, sliced 1/2" thick

  • 16 small carrots (about 900g ), unpeeled, halved lengthwise if large

Pulse garlic, parsley, fennel seeds, and 70g fennel fronds in a food processor until very finely chopped. With motor running, slowly add 60ml oil and process until smooth; season generously with salt and pepper (mixture should taste quite salty as this is the only seasoning meat will get). Rub parsley mixture all over lamb. Transfer to a roasting pan, cover, and chill at least 8 hours.

Let lamb sit at room temperature 1 hour. Bring vinegar and honey to a boil in a small saucepan. Reduce heat and simmer, stirring occasionally, until slightly thickened, 8–10 minutes. Set glaze aside.

Place racks in lower third and middle of oven and preheat to 163°C. Toss fennel and carrots with remaining 60ml oil in a medium bowl and arrange half around lamb in roasting pan; place remaining vegetables on a rimmed baking sheet.

Roast vegetables on baking sheet on lower rack and lamb on middle rack until an instant-read thermometer inserted into the thickest part of lamb registers 38°C, about 1 hour.

Increase oven to 232°C, brush roast with glaze, and continue to roast until an instant-read thermometer registers 49°C, 20–25 minutes longer. Transfer lamb to a cutting board and let rest 30 minutes before carving (temperature will rise to 60°C for medium-rare while lamb is resting).

Continue to roast vegetables, tossing occasionally, until golden and tender, 20–25 minutes longer.

Serve lamb with vegetables, topped with fennel fronds.

DO AHEAD: Lamb can be rubbed with parsley mixture and vegetables can be prepped 1 day ahead. Cover separately and chill.

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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