A slow roast leg of lamb is a classic dish that brings out the rich, savory flavors of the meat. Perfect for a special occasion or a cozy family dinner, this recipe ensures a tender and juicy result that will impress your guests. The combination of garlic, rosemary, and thyme creates an aromatic and mouth-watering experience.
When preparing this recipe, you might need to purchase fresh rosemary and thyme if they are not already in your pantry. These herbs are essential for infusing the lamb with their distinctive flavors. Additionally, ensure you have a good quality olive oil on hand, as it enhances the overall taste and texture of the dish.

Ingredients For Slow Roast Leg Of Lamb Recipe
Lamb: The main protein of the dish, providing a rich and savory flavor.
Garlic: Adds a pungent and aromatic taste that complements the lamb.
Olive oil: Helps to keep the lamb moist and adds a subtle fruity flavor.
Rosemary: A fragrant herb that pairs well with lamb, adding a pine-like aroma.
Thyme: Another aromatic herb that enhances the overall flavor profile.
Salt: Essential for seasoning and bringing out the natural flavors of the lamb.
Black pepper: Adds a hint of spice and depth to the dish.
Technique Tip for a Perfect Slow Roast Leg of Lamb
When preparing the leg of lamb, make sure to let it come to room temperature before roasting. This ensures even cooking throughout the meat. Also, when making the incisions for the garlic, use a small, sharp knife to create deep enough pockets so the garlic infuses the meat thoroughly. For the herb rub, mix the olive oil with the rosemary, thyme, salt, and pepper in a small bowl before applying it to the lamb. This helps to distribute the flavors evenly. Finally, use a meat thermometer to check the internal temperature, ensuring it reaches the desired doneness without overcooking.
Suggested Side Dishes
Alternative Ingredients
leg of lamb - Substitute with pork shoulder: Pork shoulder has a similar texture and can be slow-roasted to achieve a tender and flavorful result.
garlic - Substitute with shallots: Shallots provide a milder, sweeter flavor that complements the dish well.
olive oil - Substitute with grapeseed oil: Grapeseed oil has a high smoke point and a neutral flavor, making it a good alternative for roasting.
rosemary - Substitute with sage: Sage offers a robust, earthy flavor that pairs well with roasted meats.
thyme - Substitute with oregano: Oregano has a slightly stronger and more pungent flavor but works well in roasted dishes.
salt - Substitute with soy sauce: Soy sauce can add a depth of umami flavor and saltiness to the dish.
black pepper - Substitute with white pepper: White pepper provides a similar heat and flavor but with a slightly different aroma.
Alternative Recipes Similar to This One
How to Store or Freeze Your Slow Roast Leg of Lamb
- Allow the lamb to cool completely at room temperature before storing. This helps to prevent condensation, which can lead to sogginess and spoilage.
- Wrap the lamb tightly in aluminum foil or plastic wrap to maintain its moisture and prevent it from absorbing other odors in the refrigerator.
- Place the wrapped lamb in an airtight container or a resealable plastic bag to provide an extra layer of protection.
- Store the lamb in the refrigerator for up to 3-4 days. For longer storage, consider freezing.
- To freeze, wrap the lamb in a layer of plastic wrap followed by a layer of aluminum foil. This double wrapping helps to prevent freezer burn.
- Label the package with the date of freezing to keep track of its freshness.
- Place the wrapped lamb in a freezer-safe bag or container and store it in the freezer for up to 3 months.
- When ready to use, thaw the lamb in the refrigerator overnight. Avoid thawing at room temperature to prevent bacterial growth.
- Reheat the lamb gently in a preheated oven at 300°F (150°C) until warmed through, or use a microwave for quicker reheating. Add a splash of broth or gravy to keep it moist during reheating.
How to Reheat Leftovers
- Preheat your oven to 300°F (150°C). Place the leftover lamb in a baking dish, add a splash of broth or water to keep it moist, cover with foil, and heat for about 20-30 minutes until warmed through.
- For a quicker method, slice the lamb thinly and place it in a microwave-safe dish. Add a bit of broth or gravy, cover with a microwave-safe lid or plastic wrap, and heat on medium power for 2-3 minutes, checking and stirring halfway through.
- Reheat the lamb on the stovetop by slicing it and placing it in a skillet with a little olive oil. Heat over medium-low, turning occasionally until warmed through, about 5-7 minutes.
- Use a sous-vide method by sealing the lamb in a vacuum bag and placing it in a water bath set to 140°F (60°C) for about 45 minutes to an hour. This method ensures even reheating without drying out the meat.
- If you have an air fryer, preheat it to 300°F (150°C). Place the lamb in the basket, ensuring pieces are not overlapping, and heat for 5-10 minutes, checking halfway through to avoid overcooking.
Essential Tools for Preparing a Slow Roast Leg of Lamb
Oven: Used to preheat and roast the lamb at a consistent temperature of 325°F (165°C).
Roasting pan: Holds the lamb while it roasts, allowing for even cooking and catching any drippings.
Sharp knife: Essential for making small incisions in the lamb to insert garlic slices.
Cutting board: Provides a stable surface to prepare the lamb and chop the herbs.
Garlic slicer: Helps in slicing the garlic cloves thinly and evenly.
Meat thermometer: Used to check the internal temperature of the lamb to ensure it reaches 145°F (63°C) for medium-rare.
Mixing bowl: Useful for combining the olive oil, rosemary, thyme, salt, and pepper before rubbing them onto the lamb.
Basting brush: Helps in evenly spreading the olive oil and herb mixture over the lamb.
Tongs: Handy for handling the lamb without piercing it, which helps retain its juices.
Aluminum foil: Can be used to tent the lamb if it starts to brown too quickly during roasting.
Carving knife: Essential for slicing the lamb after it has rested.
Carving fork: Helps to hold the lamb steady while carving.
Serving platter: Used to present the carved lamb beautifully for serving.
Time-Saving Tips for Making a Slow Roast Leg of Lamb
Prepare ingredients ahead: Chop the garlic and herbs the night before to save time on the day of cooking.
Use a meat thermometer: This ensures the lamb reaches the perfect internal temperature without constant checking.
Preheat oven early: Start preheating your oven while you prep the lamb to save time.
Marinate overnight: Rub the lamb with olive oil and herbs the night before for enhanced flavor and quicker prep.
Resting time: Use the 15-minute resting period to prepare side dishes or clean up.

Slow Roast Leg of Lamb Recipe
Ingredients
Main Ingredients
- 1 leg Lamb about 4-5 pounds
- 4 cloves Garlic sliced
- 2 tablespoon Olive Oil
- 1 tablespoon Rosemary fresh, chopped
- 1 tablespoon Thyme fresh, chopped
- 1 teaspoon Salt
- 1 teaspoon Black Pepper freshly ground
Instructions
- Preheat your oven to 325°F (165°C).
- Make small incisions all over the lamb and insert garlic slices into each incision.
- Rub the lamb with olive oil, rosemary, thyme, salt, and pepper.
- Place the lamb in a roasting pan and roast in the preheated oven for about 4 hours, or until the internal temperature reaches 145°F (63°C) for medium-rare.
- Let the lamb rest for 15 minutes before carving.
Nutritional Value
Keywords
Suggested Appetizers and Desserts to Pair with This Recipe
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