The Sunday roast walks outside — smoke-kissed lamb, and the kitchen stays cool

A hooded barbecue is just an oven that lives outside and tastes better. Work a smoky rub over the lamb, set the burners for indirect heat, close the hood and let it hum along at 180 degrees while you do exactly nothing nearby with a cold drink. The bark goes mahogany, the middle stays blush pink, and the drip tray underneath quietly collects the makings of the gravy. Come summer, when the thought of a hot oven is unbearable, this is how the roast still makes it to the table.

2 hrs 6 servings Prep 15 minsCook 1 hr 45 minsMain CourseAustralian

Ingredients

  • 1 Your Farmer grass-fed lamb roast (approx 1.5kg, leg or shoulder)
  • 1 tbsp olive oil
  • 1 tbsp smoked paprika
  • 1 tbsp brown sugar
  • 2 tsp garlic powder
  • 1 tsp ground cumin
  • 2 tsp salt
  • 1 tsp cracked black pepper
  • Lemon wedges, to serve

Instructions

Mix the smoked paprika, brown sugar, garlic powder, cumin, salt and pepper in a small bowl.

1 tbsp smoked paprika1 tbsp brown sugar2 tsp garlic powder1 tsp ground cumin

Pat the lamb dry, rub it all over with the oil, then work the rub into every side and crevice. Let it sit at room temperature while the barbecue heats.

1 lamb roast1 tbsp olive oil

Set the barbecue up for indirect heat at about 180°C: outside burners on, middle burners off (or coals banked to the sides), and a drip tray with a cup of water under the empty middle.

Sit the lamb over the drip tray — never over direct flame — and close the hood. Roast for 1 hour 15 minutes to 1 hour 30 minutes, until a thermometer in the thickest part reads 57–60°C for medium. Resist lifting the hood; every peek costs you ten minutes.

Move the lamb to a warm plate, cover it loosely with foil and rest it for 20 minutes — it'll finish at 60–63°C, right on medium.

Carve across the grain and serve with the skimmed drip-tray juices poured over, a squeeze of lemon, and whatever salads the barbecue demands.

lemon wedges

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Indirect Heat: the Only Rule That Matters

Everything about barbecuing a whole roast comes down to one idea: the lamb should never sit over flame. With the outer burners on and the meat parked over the cold middle, the closed hood turns the barbecue into a fan-forced oven — except this one bastes the meat in smoke from its own drippings hitting hot metal. The water in the drip tray keeps the atmosphere gentle and catches the juices for later. A leg from a Your Farmer® share barbecues to textbook pink; a shoulder will take a lower hood temperature and an extra half hour, and reward you with softer meat. Either way the thermometer is the umpire: 57–60°C when you pull it, 60–63°C after the rest.

Swaps and Variations

The rub is a starting eleven, not a rulebook. Swap the cumin and paprika for dried oregano and lemon zest and the same lamb heads for the Aegean; a tablespoon of harissa worked in with the oil sends it to North Africa. A chunk of soaked hardwood in a foil pouch over one lit burner adds true smoke if your barbecue is gas. The same indirect setup handles lamb ribs without breaking stride, and the fire-management fundamentals are all in our steak-night-on-the-barbie guide. When the freezer needs restocking, that's what a lamb share is for.

Storage and Leftovers

Smoked-and-roasted lamb keeps 3–4 days in the fridge and freezes, sliced, for 2 months — and that faint smokiness makes it the best leftover lamb of all. Warm slices gently in the reserved drip-tray juices, or go cold: smoky lamb, chargrilled capsicum and aioli in a roll is a lunch worth planning the roast around. Leftover chunks also make superior midweek tacos — a squeeze of lime, some slaw, done.

Frequently asked questions

How do I hold the barbecue at 180°C?

Set the outer burners to medium and check the hood thermometer after ten minutes, adjusting one burner at a time. Anywhere between 170 and 190°C works fine — the thermometer in the meat matters more than the one in the hood.

Can I do this on charcoal?

Yes — bank the lit coals to the two sides, drip tray in the valley between, lamb over the tray. You'll get a deeper smoke flavour than gas. Add a few fresh coals at the one-hour mark if the heat is fading.

How do I time it without a meat thermometer?

Allow roughly 27–30 minutes per 500g at 180°C for medium — about 1 hour 20 for a 1.5kg roast — then rest it the full 20 minutes. But wind and hood-lifting swing barbecue temps around, so a probe thermometer earns its keep out here more than anywhere.

What about windy or cold weather?

Position the barbecue out of the wind and expect to add 10–15 minutes in winter — the hood sheds heat faster when it's cold. Keep the hood closed and let the thermometer, not the clock, call the finish.

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