Butterflied Leg of Lamb Stuffed with Mushrooms, Onions and Herbs

This Butterflied Leg of Lamb Stuffed with Mushrooms, Onions and Herbs is packed with flavor and will be an epic meal for any special occasion.

I love the spring time. Not only does it mean warmer weather is coming, like we freeze here in San Diego, but it also means that the days are getting longer – hooray! Spring also brings some of my flavors and foods.

For those of you celebrating Easter, Spring means a lamb dinner. We Persians absolutely adore lamb and I for one, scoop of leg of lamb every time I see it on sale at the grocery store. One of my favorite ways of preparing a boneless one is to stuff it!

Why this recipe is so awesome

When I first made this recipe, I kept it simple and stuffed it with onions and mushrooms. Oh yeah, it was heavenly. But over the years, I have modified this recipe and have added herbs to the mix. It definitely kicked up the flavor factor.

I originally posted this recipe back in 2010 (goodness where has the time gone?!), so I have recently updated the photos, recipe and content for this post. I apologize if the pictures don’t exactly match my new modified recipe. But it definitely gives you a great idea on how easy it is to stuff a boneless leg of lamb.

It is really a delicious way to prepare lamb, so don’t be intimidated thinking this is a complicated recipe to make. You do not have to de-bone a lamb yourself because you can find boneless leg of lamb very easily at the grocery store.

You do need to trim the excess fat and even out the meat. I have a video using a different stuffing (boneless leg of lamb with raisins and pine nuts), but it will help further explain how to evenly butterfly your boneless leg of lamb, stuff it, roll it and tie it up.

It might seem a lot of work, but you’ll see it is worth it when you take that first bite. 

Ingredients you need

This post contains some affiliate links for your convenience (which means if you make a purchase after clicking a link I will earn a small commission but it won’t cost you a penny more)!  Read my full disclosure policy

• Boneless leg of lamb: You can buy it already deboned or remove it from the bone yourself.
• Extra virgin olive oil: Oil adds moisture and flavor to the marinade so skimp on this thinking it is too fatty.
• Balsamic vinegar: Choose a balsamic vinegar that you love. You can use a plain balsamic or a flavored one.
• Mushrooms: You use white, button, cremini… any kind of mushrooms that you love for the stuffing.
• Fresh herbs: You can use any combination of fresh herbs you have available. I used what I had in the garden: mint, sage, thyme and chives.
• Garlic
• Onion
• Salt and pepper

Step-by-step directions

1. Place the lamb on a large work surface and open it up. Using a sharp knife, cut into the larger chunks of meat to create a flap and open it up. Continue doing this until the meat is one large flat piece, with relatively even thickness. Trim away any large pockets of fat, this reduces the gamey taste.

2. In a small bowl, whisk together olive oil, balsamic vinegar, salt, pepper and garlic cloves.

3. Place roast in a large shallow container and brush marinade all over it. Cover with foil and refrigerate roast for one hour. Remove the lamb from the refrigerator and let roast return to room temperature, about 30 minutes.

4. In a frying pan, sauté onions in olive oil until browned. Add garlic, mushrooms and herbs and cook until mushrooms release their water. Remove vegetables from heat, and cool to room temperature.

5. Spread lamb on a work surface, boned surface up. Place the mushroom mixture (without the water) in a line down the center of the length of the lamb. Starting from one end, roll up the meat tightly around the vegetables, forming a cylinder.

6. Using kitchen twine, tie the meat at 20-inch intervals along its length. Place a 4-inch square of aluminum foil over each end of the roast, to hold the stuffing in place.

Tie another piece of kitchen twine securely around the roast to keep its shape.

Lightly oil a flat roasting rack and place in a roasting pan just large enough to hold the lamb. Place roast on the pan and roast at 375ºF until a meat thermometer inserted into thickest part of the meat registers 135-140º, about 1 ¼ hours.

Recipe tips and FAQs

I can not stress enough the importance of using a meat thermometer. This is the most accurate way to see if your lamb is done. This prevents you from overcooking your roast, keeping it moist and tender.

Leftovers will keep in an airtight container in the refrigerator for 3-5 days. You can also freeze leftovers in foil or plastic wrap for up to 4 months.

If you like this recipe, you should also try my grilled butterflied leg of lamb marinated in yogurt.

PS If you try this recipe, why not leave a star rating in the recipe card right below and/or a review in the comment section further down the page? I always appreciate your feedback.

You can also follow me on Pinterest, Facebook or Instagram. Sign up for my eMail list, too!