How to Cook Grass-Fed Leg of Lamb

There’s something special about the aroma of rosemary and lamb roasting slowly in the oven. At My EIEIO Farm, we raise grass-fed, pasture-raised lamb—which means it’s leaner, more flavorful, and packed with nutrients.

If you’ve never cooked grass-fed lamb before, don’t worry—it’s simple! With just a few ingredients and a little patience, you’ll have a tender, juicy roast perfect for Sunday dinner or a special occasion.

🍽 How to Cook Herb-Roasted Grass-Fed Leg of Lamb Recipe

This recipe works beautifully for either a leg of lamb or a shoulder roast.

Ingredients:

• 1 grass-fed leg of lamb (or shoulder roast)

• 1-2 tablespoons extra virgin olive oil

• Sea salt, to taste

• Dried or fresh rosemary (generous amount)

Instructions:

1. Pat the lamb dry and score the surface lightly in a grid pattern with a sharp knife (about 1/8 inch deep). This helps the olive oil and herbs soak into the meat and allows the fat to render evenly.

2. Rub the lamb with a light coating of olive oil.

3. Salt generously, then rub in plenty of rosemary.

4. Cover and refrigerate for 2 hours or overnight to let the flavors soak in.

5. When ready to cook, bring the lamb out just long enough to come toward room temperature—don’t let it sit out too long.

6. Place in a roasting pan uncovered and cook at 325°F.

7. Roast until the meat begins to shrink away from the bone or until it reaches your desired internal temperature for grass-fed lamb.

(Medium-rare: around 135°F | Medium: around 145°F)

Let it rest 10–15 minutes before slicing to allow the juices to redistribute.

🌿 How to Cook Grass-Fed Lamb Farmhouse Notes:

• For a full meal, roast potatoes and carrots alongside your lamb to catch the drippings.

• Any leftovers make amazing sandwiches or stews!

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🐄 From Our Pasture to Your Plate, Delicious Grass-Fed Lamb

We’re proud to raise our lambs on open pasture here at My EIEIO Farm—where they graze freely and grow naturally. Every bite reflects the care and connection that comes from knowing your farmer and your food.

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Roasted Grass-Fed Lamb