The Best Vegetables to Grill on Charcoal

Vegetables are the most improved food on a charcoal grill and the cheapest thing you can put on it. Direct fire does something to a pepper or a spring onion that a pan cannot: the sugars caramelize, the edges blacken slightly, and the flavor becomes sweeter and deeper rather than just cooked.

There are only two things to get right. Match the vegetable to the zone— quick ones over the coals, dense ones on the cool side — and cut them so they can’t fall through the grate. Everything else is detail.

The direct-heat vegetables

High water content, thin or soft structure, cooks in minutes. These go straight over the coals.

Grilled romaine is the sleeper on that list. Halve a head, oil the cut face, put it cut-side down over hot coals for two minutes, and you get a warm, smoky, still-crisp salad base that people remember. It takes almost no time and no one expects it.

The indirect-heat vegetables

Dense, starchy, low water. Over direct heat the outside blackens long before the center softens, so these want the cool side with the lid down — the grill working as a smoky oven at 350-400°F.

The parboil trick is worth knowing. Eight minutes in boiling salted water before the potatoes go anywhere near the grill lets you finish them over direct heat for a crisp, charred outside in fifteen minutes rather than an hour of indirect cooking. Same for thick carrots.

Cutting for the grate

The single most common vegetable-grilling failure is losing half of it into the coals. The fix is entirely in the knife work.

• Cut across the bars, not along them. Long planks of courgette or aubergine laid perpendicular to the grate bars are supported at several points. Rounds are supported at one and pivot into the fire.
• Keep the root end on onions. Cut wedges from pole to pole through the root and the layers stay held together. Cut across and you have twenty loose rings.
• Quarter peppers rather than dicing them. Big flat pieces sit stably, char nicely and can be sliced after cooking.
• Skewer anything genuinely small. Mushrooms, cherry tomatoes, chunks of pepper. Two parallel skewers rather than one stops everything spinning when you turn it.
• Use a basket for the rest. A perforated grill basket handles chopped vegetables and green beans without any of the above.

Oil the vegetable, not the grate

Oil on hot bars smokes off in seconds and leaves the food to stick anyway. Oil on the vegetable stays where you put it, conducts heat into the surface, and promotes browning.

A tablespoon or two tossed through a whole tray is enough. More than that drips onto the coals, flares up, and coats the food in soot — which is unpleasant to eat and, per the National Cancer Institute’s guidance on grilling, the mechanism by which PAHs end up on food. Light oiling and avoiding flare-ups is the sensible default for vegetables and meat alike.

Salt before cooking on quick vegetables; salt after on watery ones like courgette if you want firmer results. Acid — lemon, vinegar, a squeeze of lime — always goes on after they come off the grill, when it lifts everything rather than stewing.

Timing vegetables around the meat

A two-zone fire makes this easy, and the sequencing more or less arranges itself.

Sear your meat over the coals first, then move it to the cool side to finish under the lid. That frees the hot zone exactly when the vegetables need it, and most vegetables cook in about the time a thick cut takes to come up to temperature and rest.

Dense vegetables go the other way round: they go on the cool side before the meat, since they need the longest. A whole head of garlic or a few potatoes tucked at the back of the indirect zone will be ready about when everything else is.

Setting up the two zones is covered in how to use a charcoal grill, and the temperature targets are in the temperature guide.

Three things that make vegetables better

Cook them in the fat. If you have grilled meat first, put the vegetables on the same part of the grate. The rendered fat left on the bars is free flavor.

Char more than feels right.Vegetables can take considerably more color than meat before they turn bitter, and blackened edges on a spring onion or a pepper are the best part. This is the opposite of the advice for meat — where heavy charring is worth avoiding — because vegetables don’t form the same compounds that make charred meat a concern.

Dress them the moment they come off. Warm vegetables absorb dressing; cold ones sit in it. Olive oil, lemon, flaky salt and something green, straight onto the hot tray.

For the vegetable that most deserves its own page, our grilled corn method covers husk-on versus husk-off in full. And if you want more ideas than a side dish, the best things to grill list goes beyond vegetables entirely.