Lemon-Herb Lamb Roast

This lemon herb lamb roast is a Sunday-supper showpiece without any of the white-tablecloth fuss. A simple rub of lemon zest, juice, rosemary, and thyme gets pressed into deep slits cut across the leg, so the seasoning works its way deep into the meat instead of just clinging to the surface.

The slits matter. Without them, the rub just sits on the outside and gives you a flavorful crust over a bland interior. With them, every slice carries the herb-and-lemon perfume all the way through.

A boneless leg roasted at 325°F (165°C) until the thermometer hits 150°F (65°C) lands you at a juicy medium with a rosy center. The yogurt pan sauce, thickened with cornstarch and brightened with the reserved pan juices, is what sets this apart from the standard mint-jelly approach.

Pro Tips

• A meat thermometer is a must here. Lamb goes from rosy to gray fast, and visual cues lie. Pull at 145°F (63°C) for medium-rare since the temperature climbs 5 degrees while resting.
• Rest the roast at least 15 minutes under loose foil before slicing. Cutting too soon dumps all the juice onto the cutting board.
• Whisk the cornstarch into the cold yogurt first. Adding cornstarch to hot liquid creates lumps that won’t smooth out.
• Bring the lamb to room temperature for 30 to 45 minutes before roasting. Cold meat from the fridge cooks unevenly, leaving the center too rare.

Variations

• Swap rosemary and thyme for a Greek-leaning rub of oregano, lemon, and minced garlic pressed into the slits.
• Use Greek yogurt for a thicker, richer sauce. Mix in a tablespoon of fresh mint for a tzatziki-style finish.
• Add 4 anchovy fillets minced into the rub. The salty umami melts into the meat without tasting fishy.