Grilling seafood skewers without sticking

There's nothing quite like the smoky char of seafood over an open flame, the kind of plate you'll find at summer gatherings from Brisbane backyards to Melbourne rooftop dinners. Many home cooks pull the skewers off only to find flesh fused to the bars and prawns torn in half. A few small techniques change everything, whether you're cooking for two on a Perth balcony or feeding a crowd on a Sydney weekend.

This guide pulls together what beachside chefs and weekend BBQ enthusiasts in Australia already know: the right skewer, oil, heat, and moment to flip. Every tip works with locally sourced seafood, from Spencer Gulf prawns to South Australian squid, and suits the bright, summery flavours of an outdoor table.

Choosing the right skewers for the job

Metal skewers conduct heat, so they cook seafood from the inside out, a real advantage with delicate proteins like prawn or scallop. Flat metal skewers prevent pieces from spinning when you flip, keeping the fish exactly where you placed it. Soak wooden or bamboo skewers in water for thirty minutes before threading; otherwise they'll scorch.

Thread seafood snugly but never cram pieces together. Overpacked skewers steam rather than sear, and steaming is what welds protein to hot metal. Leave a few millimetres between pieces for airflow. For prawns, thread them in a C-shape so they lie flat against the grates. Starting from a whole fish fillet? Brush up on preparing whole fish before cutting it into cubes.

The oil trick most cooks skip

Oil has two jobs: protect the food and protect the grill. Pat seafood dry with paper towels before brushing, because surface water is the main cause of sticking. Apply a thin coat of oil to the seafood, not just the grates. A neutral oil with a high smoke point, like grapeseed or rice bran, handles the radiant heat of an Australian grill without burning.

Brush the grates with oil right before the seafood goes on, then wipe once more with a folded paper towel held by tongs. Clean, oiled, hot grates release food with the same ease that a non-stick pan offers indoors. Skip this step and you'll be chiselling prawns off the bars with a spatula for the rest of the afternoon.

Getting the heat just right

Most people undercook seafood or scorch it because they treat fish and shellfish like steak. The sweet spot for almost all seafood on a skewer is medium-high heat, around 200°C, with the lid closed between flips. The closed lid mimics a convection oven, finishing the inside without carbonising the outside.

Set up a two-zone fire if you can: one hot side for the initial sear and a cooler side for finishing thicker pieces like whole fillets of firm white fish. Australian cooks who grill year-round, even through mild Sydney winters or humid Brisbane summers, use it for everything from kangaroo to flathead. The method buys you control: blast a side, then slide the seafood over to coast to the right internal temperature without any sticking drama.

Timing matters for different seafood

Prawns need roughly two minutes per side. Larger king prawns, pulled fresh from the trawlers at the Sydney Fish Market, may need more, but watch for the colour change from translucent to opaque and pull the moment they curl into a tight C. Scallops sear beautifully on a skewer, needing only ninety seconds per side.

Cubed salmon or tuna stays on a bit longer, around three minutes per side for salmon, less for tuna if you prefer it blushing. Octopus and squid, often overlooked despite being abundant along Australia's southern coast, do best with a brief pre-boil before skewering; the tenderising step keeps them from gripping the grates. Squid tubes should cook no more than two minutes total.

Australian seafood picks worth skewering

The country's seafood market is one of the cleanest and most diverse in the world, and that variety makes skewer work a pleasure. Spencer Gulf prawns, Moreton Bay bugs, South Australian squid, and Tasmanian salmon show up in fishmongers from Adelaide to Perth. For skewer cooking, the smaller, firmer pieces work best: peeled prawn tails, scallop roe-off, swordfish cubes, and boneless fillets of coral trout or flathead.

Pick up fresh prawn cutlets from a Brisbane counter or Sydney fishmonger for an instant meal. Locally caught squid tubes can be butterflied and scored lightly before threading, opening up more surface area for the marinade. Salmon belly strips from a Woolworths or Coles seafood cabinet grill beautifully with a simple soy, ginger, and sesame oil glaze. Curious pet parents often ask which scraps are safe for dogs; plain boneless cooked fish is fine, but keep the skewers for humans.

Mistakes that lead to sticking

Moving seafood too early is the most common error. If the flesh resists when you try to lift it, it isn't ready. Wait another thirty seconds and try again; the natural sugars and proteins release on their own once a proper crust forms. Forcing the lift tears the surface and leaves half the meal welded to the grill.

Another mistake is layering cold seafood straight from the fridge onto a hot grill. The temperature shock makes proteins contract violently and bond to the metal. Let the skewers rest on the bench for ten to fifteen minutes first. Over-marinating in acidic mixtures, particularly lemon-heavy marinades, breaks down the surface and turns it mushy on the bars. Keep acidic components to a brief dunk at the end, not a long soak beforehand.

Serving and what to pair with it

Pull the skewers off the grill and let them rest for a minute, long enough for the juices to settle. A squeeze of lime, a drizzle of good olive oil, and a pinch of flaky salt finish most seafood without crowding the flavour. Serve with a crunchy slaw, grilled flatbread, or a bright herb salad dressed with lemon and parsley.

If hosting in Melbourne or Sydney, build the meal around the skewers with charred corn, herbed rice, or watermelon and feta. For casual weeknights, pair them with noodles in soy, ginger, and chilli, or wrap in flatbread with garlic yoghurt. The seafood version wins over the pickiest eaters.

Upgrade your next grilling night with the freshly cooked range of ready-to-eat seafood meals, kebabs, and marinades that take the guesswork out of every cook. Stock up on quality seafood, from cuts to marinades. The first skewer of the season should be the best one yet.