A generous London broil for a relaxed group dinner

A well-made London broil is a smart choice when several people are coming to dinner. A single beef roast can feed a table generously, it can be prepared ahead, and it looks far more impressive than the effort involved. The key is to treat it as a method rather than a particular cut: marinate lean beef, cook it quickly over high heat, rest it well, then slice it thinly across the grain.

For Australian cooks, the closest butcher-counter choices are usually topside, thick flank or eye of round. These cuts are lean and economical, which makes them useful for a larger gathering, though they need careful cooking to stay tender. Ask your local butcher for a thick, even piece of beef suited to grilling or pan-searing rather than a thin schnitzel-style cut.

The finished dish fits easily into an informal Saturday-night spread, a polished dinner party or a gathering with a few mates. Serve it with roasted vegetables, a sharp salad, crusty bread and a red wine with enough freshness to balance the marinade. It has the relaxed appeal of a backyard barbecue, with the refined presentation of a bistro meal.

Choose the right cut and size

Plan on approximately 200 to 250 grams of raw beef per adult when the meal includes several sides. For eight guests, a piece weighing 1.8 to 2 kilograms is a practical starting point. A thick, evenly shaped topside roast will cook more consistently than a narrow or tapered piece, and trimming away any tough silverskin will improve the final texture.

Australian beef labels can vary between supermarkets, independent butchers and regional suppliers. Grass-fed beef often has a clean, savoury flavour, while grain-finished beef may offer a richer, rounder taste. Either works here. In Melbourne or Sydney, a quality butcher may be happy to cut a thick piece to order; in regional areas, a local butcher can often recommend the best equivalent to American “top round”.

Take the beef from the refrigerator about 30 to 45 minutes before cooking. It should not sit out for hours, but removing the deep chill helps the centre cook more evenly. Pat the surface dry before marinating or searing so the meat browns rather than steams.

Build a marinade with balance

A useful marinade needs salt, acid, oil and aromatic flavour. For 1.5 to 2 kilograms of beef, combine 125 millilitres of olive oil, 80 millilitres of soy sauce, 60 millilitres of red wine vinegar, two crushed garlic cloves, one tablespoon of Dijon mustard, one tablespoon of brown sugar, cracked black pepper and chopped rosemary or thyme. A little smoked paprika adds depth without making the beef taste like ordinary barbecue fare.

Whisk everything together and reserve a small portion before it touches the raw meat if you want a finishing sauce. Place the beef in a non-reactive dish or sealed food-safe bag, coat it thoroughly and refrigerate for at least four hours. Overnight is convenient, although very acidic marinades can soften the outer surface if left for more than 24 hours.

The sugar encourages browning, so watch the heat carefully during cooking. If you plan to brush on extra marinade, use only liquid that has been boiled for several minutes first. This matters at a group dinner, where food may sit out while guests arrive and serve themselves.

Prepare for intense, even heat

A barbecue is ideal for London broil, particularly in Australia where outdoor cooking is part of everyday entertaining. Preheat a gas barbecue with the lid closed, or prepare a kettle barbecue with a hot zone and a cooler zone. The grill should be hot enough that the beef sizzles immediately when it touches the grate.

For indoor cooking, use a heavy cast-iron grill pan or a large frying pan. Open a window or switch on the rangehood because the marinade will create smoke as it caramelises. Sear the beef over high heat for several minutes per side, then move it to a moderate oven if the outside is darkening before the centre reaches the desired temperature.

A reliable digital thermometer is more useful than timing alone. For medium-rare, remove the beef at about 52 to 54°C; it will rise a little while resting. Medium is usually around 58 to 60°C. Australian food-safety guidance places strong emphasis on careful handling, so keep raw and cooked utensils separate and refrigerate leftovers promptly.

Cook by temperature, not guesswork

Dry the marinated beef lightly before it reaches the grill. Excess liquid can cause flare-ups, while a thin coating will still provide plenty of flavour. Sear each broad side until deeply browned, turning only when the meat releases easily from the grill. If the piece is very thick, finish it over indirect heat with the barbecue lid closed.

For an average 1.5-kilogram roast, direct cooking may take roughly five to seven minutes per side, followed by additional indirect cooking. These figures are only a guide because barbecue plates, charcoal intensity and the shape of the beef vary. Begin checking the internal temperature early rather than relying on a fixed cooking time.

When the beef reaches your target temperature, transfer it to a board and loosely cover it with foil. Rest it for 15 to 20 minutes. This allows the juices to settle and gives you time to finish the salad, pour the wine or warm the serving plates without rushing the carving.

Slice for tenderness and presentation

Finding the grain is the most important carving step. Look for the long muscle fibres running in one direction across the surface. Position your knife across those lines and cut thinly on a slight angle. Slicing with the grain creates long, chewy fibres; slicing against it shortens them and makes lean beef feel much more tender.

Use a long, sharp carving knife and wipe the blade occasionally. Aim for slices about 5 millimetres thick. If the centre is pinker than expected, do not panic: thin slices allow guests to choose their preferred portions, and the outer pieces will be more cooked than the middle.

Arrange the slices on a warm platter and spoon over a little of the resting juice. A sauce made from the reserved marinade, reduced red wine and a knob of butter is excellent, while horseradish cream, chimichurri or a mustardy pan sauce gives the beef a different direction.

Build a table around the beef

For an Australian group dinner, serve the broil with crisp roast potatoes, grilled zucchini, green beans or a tomato salad with basil. A sharp slaw can cut through the richness, and warm sourdough is useful for catching the juices. In warmer parts of Queensland or Western Australia, a chilled cucumber and herb salad may suit the weather better than heavy roasted sides.

Choose a medium-bodied red such as Australian Shiraz, Cabernet Sauvignon or a savoury Grenache. A bottle from the Barossa Valley brings generous fruit, while a cooler-climate Pinot Noir from Tasmania or Victoria offers a lighter, more delicate match. If guests prefer beer, a pale ale or lager works well with the charred edges and salty marinade.

For a dinner inspired by the easy elegance of a wine bar or European-style bistro, finish with a simple dessert such as poached fruit, chocolate mousse or pavlova served in individual glasses. Keep the meal relaxed: the beef can rest on the board, sides can be passed around, and nobody needs to wait for a complicated final course.

The best London broil is built on a few dependable habits: choose a thick lean cut, marinate it with balance, use a thermometer, rest it properly and slice it across the grain. Remember that tenderness comes as much from the carving as from the cooking, and a carefully prepared roast can turn an affordable piece of Australian beef into the centrepiece of a generous table.