Slow Roast Leg of Lamb

Name: Slow Roast Leg of Lamb
Prep time: 15 min
Cook time: 5 h 15 min
Total time: 5 h 30 min
Cuisine: American
Ingredients: 2.25 kg / 4.5 lb leg of lamb , bone in (or shoulder) (Note 1); Salt and pepper; 1.5 tbsp olive oil; 1 whole garlic head (, unpeeled, cut in half horizontally); 1 onion (, quartered (unpeeled is fine)); 2 rosemary sprigs ((2 = whisper of rosemary flavour, 4 sprigs = stronger flavour)); 3 cups beef stock/broth (, low sodium (or homemade)); 2 cups water; 4 tbsp flour ((white)); 1 cup water; Salt and pepper (, to taste)

Instructions

Prep:15minCook:5h 15min

Recipe video above. A very forgiving, very easy way to roast a leg of lamb, where the meat is slow-cooked until it's tender enough to pull it off the bone with tongs. It is not the blushing pink flesh carving sort (use this traditional Roast Lamb recipe if that's what you're after). Lamb leg is lean, so to slow cook it's best to partially submerge in a flavoured liquid which keeps the flesh moist plus infuses with flavour. I'm using garlic and rosemary in this recipe - classic lamb flavours!**IMPORTANT**: Lamb leg is lean so it should only be cooked for 1.5 hours until blushing pink & juicy (per this traditional Roast Lamb recipe) or slow cooked for 4.5 hrs until fall apart (this recipe). Anything in between is tough and not nice! For more roast lamb recipes, browse the recipe collection.

Updated at: Mon, 29 Dec 2025 17:16:05 GMT