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A Juicy, Herb-Infused Lamb Roast Perfect for Any Occasion!
Prep Time: 15 minutes Cook Time: 40-45 minutes Serves: 6
Looking for an easy yet impressive centrepiece for your next family meal? This Garlic & Rosemary Butterflied Leg of Lamb is packed with flavour, thanks to a fragrant marinade of garlic, rosemary, and olive oil.
Butterflying the lamb ensures faster cooking and a beautifully even sear, while roasting it alongside vegetables makes this a one-pan wonder!
1. Ingredients

For the Lamb:
- 1.5kg Tender Gourmet Butchery Butterflied Leg of Lamb
- 3 tablespoons olive oil
- 3 garlic cloves, minced
- 2 tablespoons fresh rosemary, chopped
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 teaspoon Dijon mustard
- Juice of 1 lemon
For the Roasted Vegetables:
- 3 large potatoes, cubed
- 2 carrots, sliced
- 1 red onion, quartered
- 1 zucchini (courgette), sliced
- 2 tablespoons olive oil
- Salt & pepper to taste
2. Instructions

Let’s get cooking! Follow these simple steps to create a perfectly roasted butterflied leg of lamb.
Prepare the Marinade: In a bowl, mix olive oil, garlic, rosemary, salt, pepper, Dijon mustard, and lemon juice. (Note: you can save time by purchasing a pre-marinated Butterflied Lamb Legs in 5 delicious flavours)
Marinate the Lamb
- Rub the marinade all over the butterflied leg of lamb and let it sit at room temperature for 30 minutes.
Preheat & Prepare
- Preheat oven to 200°C (or heat a BBQ to medium-high).
- Toss the potatoes, carrots, onion, and zucchini with olive oil, salt, and pepper. Spread on a roasting tray
Cook the Lamb
- Oven Method: Place lamb over the vegetables and roast for 40-45 minutes for medium-rare (55-60°C internal temp).
- BBQ Method: Grill over medium heat for 6-8 minutes per side, then let it rest.
Cooking Tips
- For extra tenderness, bring steaks to room temperature before cooking.
- To enhance the crust, press the spice blend firmly onto the steak before searing.
- For medium doneness, cook steaks for 4-5 minutes per side.
Rest & Serve
- Let the lamb rest for 10 minutes before slicing.
- Serve with the roasted vegetables and a drizzle of pan juices.
Cooking Tips:
- For extra flavour, marinate the lamb overnight.
- For a crispier crust, sear the lamb in a hot pan before roasting.
- Pair with tzatziki or mint sauce for a fresh contrast.