Borrego no Forno (Portuguese Roast Lamb with Potatoes)

In Portuguese cooking, borrego no forno is a generous roast of lamb and potatoes, usually served as a centrepiece dinner rather than a fussy plated dish. Bone-in lamb shoulder suits the slow roast well, becoming tender as garlic, bay leaves, sweet paprika and white wine season the pan juices. The potatoes are added to the same roasting dish so they cook in the lamb fat and winey juices, turning golden at the edges while staying soft inside. A final drizzle of olive oil and a squeeze of lemon sharpen the richness, making this an easy, deeply savoury roast with plenty of built-in side dish appeal.
Cuisine style Portuguese home-style roast
Flavor profile Savoury • Garlicky • Wine-braised richness
Techniques Covered roasting • Uncovered browning
Key equipment Oven • Roasting pan
Cooking style Hands-off cooking • Crowd-friendly • Minimal cleanup
Time commitment Under 3 hours

Why this recipe works

  • Gentle roast, strong finish: Covered roasting helps the lamb shoulder turn tender before the final uncovered roast builds colour and concentrates the pan juices.
  • Aromatic pan juices: Garlic, bay leaves, sweet paprika, white wine and lamb juices create a savoury base that seasons both the meat and potatoes.
  • Potatoes cook in the same pan: Adding the potatoes partway through lets them roast until golden while absorbing the garlicky, wine-enriched cooking juices.
  • Fresh finish: Lemon and white wine cut through the richness of the lamb, keeping the final dish bright rather than heavy.

Get the most out of this recipe

Timing notes

  • Rest before carving: Resting the lamb after roasting allows the juices to settle, making the meat easier to carve and more succulent at the table.
  • Mostly hands-off: The active preparation is short; most of the time is spent in the oven, with only a turn, a baste and the potatoes added midway.
  • Serve while the potatoes are hot: The lamb can rest briefly, but the potatoes are best served soon after roasting while their edges are still golden.

Authenticity notes

  • Portuguese home-style roast: The combination of lamb, garlic, bay, paprika, wine and potatoes reflects a simple Portuguese roasting style built on pan juices rather than a separate sauce.
  • Built for sharing: Carving the lamb and serving it with the potatoes from the roasting pan suits a generous family-style meal.
  • Wine variation: Dry white wine keeps the roast lighter, while dry red wine gives a deeper, more robust flavour.

Ingredient notes

  • Choose shoulder for tenderness: Bone-in lamb shoulder is well suited to this style of roasting because it becomes tender with steady cooking and gives the pan juices good depth.
  • Tear the bay leaves: Tearing the bay leaves before roasting helps release their aroma into the wine and lamb juices.
  • Use lemon to balance richness: Add the final lemon to taste so the acidity lifts the lamb without overpowering the savoury pan juices.

Make-ahead tips

  • Prep ahead: The garlic can be sliced and the potatoes scrubbed in advance, making the roasting stage quicker to assemble.
  • Reheat gently: Reheat leftovers in a 180°C (355°F) oven with a little water or pan juice to help keep the lamb moist.
  • Freeze cooked portions: Cooked lamb and potatoes can be frozen in portions, then defrosted overnight in the fridge before reheating until piping hot.

Equipment you'll need

Ingredients
Instructions
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  1. Heat the oven to 170°C (340°F). Peel and thinly slice the garlic; tear the bay leaves once to help them release their aroma.
  2. Put the lamb in a roasting pan. Rub all over with the sweet paprika, fine sea salt and black pepper, then scatter over the garlic and bay leaves.
  3. Pour in the dry white wine and 3 tbsp of the extra virgin olive oil. Cover the pan tightly with foil, then roast for 1 hour 30 minutes, turning the lamb once halfway through.
  4. Meanwhile, scrub the new potatoes and cut any larger ones in half. Cut the lemon in half.
  5. Remove the foil and spoon some of the pan juices over the lamb. Add the potatoes around the lamb, turning them in the juices, then squeeze in the juice from half the lemon.
  6. Increase the oven to 200°C (390°F) and roast uncovered for 40 minutes, turning the potatoes once, until the lamb is deeply browned and very tender and the potatoes are golden. If the pan looks dry at any point, splash in a little more wine to keep the juices flowing.
  7. Transfer the lamb to a board and rest for 15 minutes, loosely covered. Drizzle the remaining 2 tbsp olive oil over the potatoes and pan juices, then carve the lamb and serve with the potatoes and a squeeze of the remaining lemon to taste.

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Recipe notes

Tips

  • For the most tender result, aim for lamb that pulls apart easily when pressed with a spoon; if it still feels tight after roasting, cover again and cook for a further 15 to 25 minutes.
  • Turn the potatoes in the pan juices at least once so they roast evenly and pick up the garlicky, winey flavour.

Substitutions

  • Replace Dry White Wine with dry red wine for a deeper, more robust roast.
  • Replace Lemon with lime for a sharper citrus finish.

Storage

  • Refrigerate up to 3 days
  • Cool leftovers quickly, then refrigerate in a sealed container. Reheat lamb and potatoes in a 180°C (355°F) oven with a splash of water or pan juices until piping hot; freeze in portions for up to 2 months and defrost overnight in the fridge before reheating.

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Borrego no Forno (Portuguese Roast Lamb with Potatoes)
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Recipe overview

  • Servings: 4 servings
  • Total time: 2h 45min (20min active)
  • Difficulty: Easy
  • Cuisine: Portuguese
Beginner friendly One pot Freezer friendly Kid friendly

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