Slow-Roasted Lamb

Slow-Roasted Lamb with Dijon, Balsamic & Mint

Looking for a holiday centerpiece that feels both comforting and elevated? This slow-roasted lamb is the perfect alternative to brisket for Rosh Hashanah or any festive gathering. Infused with garlic, Dijon mustard, balsamic vinegar, and mint, the lamb cooks low and slow until it’s tender and deeply flavorful. Nestled among onions, rosemary, and potatoes, it makes a full meal that’s both rustic and elegant.

Ingredients

For the lamb

    •    8–10 cloves garlic, peeled

    •    2 large onions, sliced

    •    Kosher salt & freshly ground black pepper, to taste

(I use Jennifer Fisher Universal Salt, which has added herbs and seasonings)

    •    2 tablespoons Dijon mustard

    •    ½ cup balsamic vinegar

    •    1 bottle mint sauce or 1 jar mint jelly

    •    1 cup beef bouillon

    •    Olive oil, for drizzling

    •    Fresh rosemary sprigs

    •    Potatoes of your choice, peeled and halved

For the fresh mint sauce

    •    2 tablespoons sherry, malt, or red wine vinegar

    •    2 tablespoons whole grain mustard

    •    1 tablespoon honey (more if you prefer sweeter)

    •    1 cup chopped fresh mint leaves

Instructions

Step 1: Prepare the Lamb

    1.    Preheat your oven to 300°F (150°C).

    2.    Scatter the sliced onions across the bottom of a roasting pan.

    3.    Make small cuts in the lamb and insert a few garlic cloves directly into the meat. Scatter the remaining garlic cloves around the pan.

    4.    Smear the lamb generously with Dijon mustard. Season with salt and pepper.

    5.    Pour the balsamic vinegar, mint sauce, and beef bouillon over the lamb.

    6.    Drizzle lightly with olive oil.

Step 2: Add Potatoes & Aromatics

    1.    Arrange the potatoes around the lamb and season.

    2.    Add rosemary sprigs for extra fragrance.

    3.    Cover the lamb with a piece of parchment paper, then seal tightly with foil.

Step 3: Slow Roast

    •    Roast for 2 hours if using a boneless shoulder, or 3 hours for bone-in.

    •    Remove the parchment and foil, increase the oven temperature to 350°F (175°C), and roast uncovered for an additional hour to develop a rich crust.

Step 4: Rest & Crisp

    •    Allow the lamb to rest for at least 20 minutes before slicing.

    •    While it rests, return the potatoes to the oven at high heat to crisp them up if desired.

Step 5: Make the Fresh Mint Sauce

    1.    In a small bowl, whisk together the vinegar, whole grain mustard, and honey.

    2.    Stir in the fresh mint leaves until combined.

    3.    Adjust sweetness with more honey if preferred.

To Serve

Slice the lamb, arrange it on a platter with the potatoes, and drizzle generously with the fresh mint sauce. Pair with seasonal sides for a feast-worthy holiday table.

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💡 Hosting Tip: This dish pairs beautifully with simple green vegetables or a crisp salad to balance the richness. Leftovers make an incredible lamb sandwich the next day.