Recipes > Roasted Lamb Sirloin

Roasted Lamb Sirloin


Moist and tender roasted lamb sirloin is finished with a full-flavored shallot and red wine pan sauce.
  • Serves: 3 to 4
  • Active Time: 30 mins
  • Total Time: 45 mins
  • Views: 117,410
  • Success Rating: 93% (?)
    0% - I fed it to the dog


Step 1: Preparing the Lamb Sirloin

Preparing the Lamb Sirloin
  • three 5 oz lamb sirloins


To prepare the lamb, first trim off any silver skin (see related drill-down on cleaning pork tenderloin). Once done, place the sirloin onto a cooling rack and temper the meat for about 30 minutes at room temperature. This will help the meat cook quicker and more evenly.

Step 2: Pan Frying and Roasting the Lamb

Pan Frying and Roasting the Lamb
  • grapeseed oil
  • kosher salt (to taste)
  • freshly ground black pepper (to taste)


Preheat the oven to 325° degrees Fahrenheit (160° C). Pat the lamb dry with paper towels and then coat with a thin layer of oil. Season with salt and pepper.

Next, preheat an oven-proof, stainless-steel pan over medium- to medium-high heat. Once the pan is heated, add the oil and then place the lamb presentation-side down. Let it cook for about 2 or 3 minutes, until the underside is golden. Then flip and cook for another minute or so on the other side.

Transfer to the oven for approximately 10 to 15 minutes. Ultimately, this will depend on size of the sirloin and how you like your lamb cooked. Lamb sirloin is quite lean, so it is best served medium-rare.

Step 3: Preparing Your Mise en Place

Preparing Your Mise en Place
  • 1 medium shallot
  • 1/2 cup full-bodied red wine
  • 1 cup demi glace (or reduced, dark chicken stock)
  • 6 to 8 juniper berries (optional)


While the lamb is cooking, prepare the ingredients for the sauce. Mince the shallots and measure out the red wine, stock and juniper berries. To release more of the aroma from the juniper berries, lightly crush them using the back of your knife.

Step 4: Checking the Lamb

Checking the Lamb


When removing the lamb from the oven, remember that the handle will be extremely hot. Make sure to place an oven mitt or cloth over the handle and leave it there to remind yourself.

From the side of the sirloin, insert a thermometer into the lamb so it reaches the middle. For medium-rare, the temperature should read 120°F (about 50°C). The lamb will continue to cook a bit as it rests, due to the carry over cooking.

Transfer the lamb to a cooling rack and tent with foil. While the lamb is resting, you can start the sauce.

Step 5: Making the Sauce

Making the Sauce
  • kosher salt (to taste)
  • freshly ground black pepper (to taste)
  • 2 to 3 tsp cold, unsalted butter


To make the sauce, place the pan over medium heat. Just remember that the handle will still be very hot. If there isn’t much oil in the pan, add a bit, followed by the shallots. Scrape the bottom of the pan to incorporate the sucs. Once the shallots are soft and translucent, add the red wine and scrape the bottom to release any more sucs. Bring the wine to a simmer and let reduce until almost all of it has evaporated. Add the stock, stir to combine and then add the juniper berries. Bring the sauce to a simmer and let reduce again until you reach a sauce-like consistency. Then turn the heat to low and slowly stir in the cold butter. Taste for seasoning.

If you like, you can strain the sauce for a nice, smooth finish. Strain the sauce into a pot so you can reheat it, if necessary, just before serving.

Step 6: Slicing and Serving the Lamb

Slicing and Serving the Lamb


Once the lamb has rested, slice it across the grain into 1/4" -inch thick pieces. Place onto the plate and fan the pieces slightly to expose the beautiful pink color inside.

Make sure the sauce is hot. Spoon it over the bottom half of the lamb. Serve immediately with some Roasted Fingerling Potatoes.


  • Charles B
    Charles B
    this should be fine
  • Diarmuid B
    Diarmuid B
    The small picures are not displaying. all I see is a red x in the check box plus the text of the label. The first picture, of the dish, is visible.
  • Joe G
    Joe G
    Hi Diarmuid. All seems fine here. I'll contact you offline. Thanks.
  • Patrick O
    Patrick O
    Ended up getting a 16oz (whole sirloin) from my butcher which was perfect for the 2 of us. Trimmed it of excess fat and silverskin, after searing in a hot pan,15 minutes in a 400 deg oven (I was making the roasted fingerlings as well) and it came out at about 115 deg,tented for 10 minutes and voila, medium rare. Paired it with a 2004 Castelgiocondo Brunello for a divine Valentines dinner. Cheers!
  • Maria K
    Maria K
    The meat on the plate is 4 slices.I thought we should use odd numbers.
  • Dawn T
    Dawn T
    In cooking, just like in life, there are always exceptions. The lamb sirloin was cut into 4 pieces simply because the size of the sirloin dictated the number of slices according to the thickness we wanted them. Cheers!
  • Mary U
    Mary U
    Can you bake lamb in an oven and for how long? And at what temperature.
  • Randall M Rouxbe Staff
    Randall M
    Hi Mary, Absolutely, you can roast the lamb sirloin steak in an oven, over coals or using any number of dry heat methods. If you use moist heat cooking methods, you will not get caramelization that gives flavor and color. Here is one way: Preheat the oven to 200C/400F and when the oven is ready, this little pillow of lamb goodness will be ready for the oven. Roast for 20 minutes if you like your lamb medium rare and 25 minutes if you like it more well done. If you are good with smoke and fire, you might grill for 5 minutes and slow smoke for another 20-50 min, depending on smoker heat. Cheers, Chef Randall

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