Charred Sweet Potatoes with Lime and Sea Salt / WTBBQ

The side I make when I want sweetness with a bit more backbone
I make charred sweet potatoes with lime and sea salt when the barbecue needs something soft, smoky and substantial, but not heavy. They’ve got natural sweetness, a little caramelised edge from the grill and just enough lime to stop them feeling too cosy. That balance makes them incredibly useful beside sticky pork ribs with deeper glazes.

Why sweet potatoes work so well with rich barbecue flavours

Sweet potatoes take smoke and char beautifully, and their sweetness has a steadier, earthier feel than corn or fruit-based sides. Lime sharpens them up and flaky sea salt keeps everything tasting focused. I mentioned them with Sticky Chipotle Coffee Pork Ribs with Dark Brown Sugar because the soft sweetness works brilliantly against that dark smoky glaze. They also sit very nicely beside Sticky Pineapple Scotch Bonnet Pork Ribs with Molasses, where the charred edges give the plate a bit of grounding.

The kind of side dish that holds its own

I like sides that can stand up to ribs without trying to outshout them. Sweet potatoes manage that rather well. They soak up smoky flavour, give the plate some real substance and bring a soft contrast to sticky lacquered pork. They’re not flashy, though they do a lot of quiet work, which I always appreciate when the main dish is already strutting about.

Why I keep this version simple

I could pile these with yoghurt, herbs, spices and all sorts of extras, though when I’m serving them with spicy ribs I usually keep things straightforward. A bit of oil, a good char, lime and sea salt are enough. That way the sweet potatoes taste like themselves and still leave room for the pork to be the thing everyone talks about.

Ingredients for 4 people

900 g sweet potatoes
2 tbsp olive oil
1 tsp fine sea salt
1/2 tsp cracked black pepper
1 lime, zest finely grated
1 1/2 tbsp lime juice
1 tsp flaky sea salt, for finishing
1 tbsp chopped coriander or parsley, optional

Ingredient notes

I like medium sweet potatoes because they’re easier to cut into evenly sized wedges or thick slices, and that means they cook more predictably on the grill. Very large ones can be useful, though they often need more trimming and have a habit of giving you awkward shapes that char unevenly.

Fresh lime is doing a lot here. The zest brings fragrance and the juice wakes the sweet potatoes up right at the end. Without it, they can feel a little one-note beside rich ribs. Flaky salt is worth using for the finish too, because those small crisp bursts of salt against the soft sweet potato are exactly what make the whole thing work.

Equipment needed

You’ll need a BBQ set up for medium heat, a saucepan or microwave-safe bowl for par-cooking the sweet potatoes, a large bowl for seasoning and a sturdy pair of tongs or a fish slice for turning them on the grill. Sweet potatoes can soften quite a bit, so a bit of care helps.

I also like using a grill basket or a well-oiled section of grate if I’m cutting them into smaller pieces. Larger wedges are easier to manage directly on the bars, though if you’re cooking a lot of things at once a basket can save you from chasing the occasional rogue bit into the fire.

Instructions

Step 1: Prep the sweet potatoes

Peel the sweet potatoes if you like, or leave the skins on for a slightly more rustic finish. Cut them into thick wedges or chunky slices of roughly even size.

Step 2: Par-cook until just tender

Bring a pan of salted water to the boil and cook the sweet potatoes for 6 to 8 minutes, until just beginning to soften but not falling apart. Drain well and leave them to steam dry for a few minutes.

Step 3: Season them

Put the sweet potatoes in a large bowl and toss gently with the olive oil, fine sea salt and black pepper.

Step 4: Grill over medium heat

Place the sweet potatoes on the BBQ over medium direct heat and cook for 10 to 14 minutes, turning carefully every few minutes, until they have good char marks and are tender all the way through.

Step 5: Finish with lime and salt

Transfer to a serving dish and finish with lime zest, lime juice, flaky sea salt and chopped coriander or parsley if using. Serve hot.

How I get sweet potatoes charred outside and soft in the middle

The main trick here is par-cooking. Sweet potatoes can look beautifully charred on the outside while still being a bit firmer than you’d like in the middle, which is deeply annoying when everything else is ready. A short boil first solves that problem. It gives them a head start, so all the grill has to do is add smoke, colour and a bit of edge.

I also let them steam dry after draining because wet sweet potatoes don’t char especially well. If they go onto the grill still damp, they’re more likely to stick and soften than brown properly. A little dryness on the surface, plus a coating of oil, makes it much easier to get those lovely dark patches that taste almost caramelised without tipping into burnt bitterness.

Wine and beer pairings

For wine, I like a dry rosé or a soft juicy red with these, depending on what the main dish is doing. With spicy ribs, a chilled rosé keeps things fresh and doesn’t get weighed down by the sweet potatoes. If the plate leans darker and smokier, a fruity red with gentle tannins can work well.

For beer, an amber ale is a very good fit. The malt plays nicely with the sweet potatoes and the charred notes, while still standing up to smoky barbecue flavours. A lager also works well if you want something cleaner and more refreshing, especially when the ribs are bringing plenty of spice.

FAQ

Do I need to boil sweet potatoes before grilling?

I strongly recommend it for this recipe. A short par-cook helps them become tender inside while still charring properly on the outside.

Can I grill sweet potatoes without peeling them?

Yes. The skins are edible and can add a bit of texture. I leave them on when the sweet potatoes look good and the skins aren’t too tough.

How long do sweet potatoes take on the barbecue?

After par-cooking, they usually need 10 to 14 minutes over medium direct heat to char and finish cooking through.

Why are my sweet potatoes sticking to the grill?

They’re often too wet, not oiled enough or being moved too soon. Let them char a little before turning and make sure the grate is clean.

Can I make these ahead of time?

Yes. You can par-cook them ahead, then grill and finish them just before serving.

What goes well with charred sweet potatoes?

They’re excellent with spicy ribs, grilled chicken, sausages, salads and barbecue dishes with smoky or sticky glazes.

Tips for Success with charred sweet potatoes

The best charred sweet potatoes with lime and sea salt come from getting the texture right before they even hit the barbecue. Par-cook them until just tender, not fully soft. If they’re too cooked at that stage, they can collapse or stick when you try to turn them. I want them firm enough to hold shape, but soft enough that the grill only needs to finish the job.

It also helps to finish them generously. The lime and flaky salt are not decorative extras, they’re what turn the sweet potatoes from pleasant to properly useful beside rich barbecue. The lime gives a sharp clean lift, and the salt keeps the sweetness from becoming too gentle and vague. Don’t be shy with either.

Recipe variation suggestions

You can nudge these in a warmer direction by adding smoked paprika or chilli flakes before grilling. That works especially well if you’re serving them with the chipotle ribs, because the smoky sweet flavours line up beautifully. A little cumin can work too, though I’d keep it restrained so the sweet potato still comes through clearly.

For a greener fresher finish, scatter over coriander, spring onion or parsley after grilling. If you want a richer side, add a spoonful of yoghurt or a drizzle of tahini dressing at the end. That version is especially good when the rest of the barbecue spread is feeling a bit fiery and could use something cooling.

Storage and reheating for charred sweet potatoes

Store leftover sweet potatoes in an airtight container in the fridge for up to 3 days. They hold up quite well, especially if they were charred properly to begin with and not drowned in too much finishing juice.

To reheat, put them back on the BBQ over medium heat for 5 to 8 minutes, turning once or twice until hot and lightly re-crisped at the edges. You can also reheat them in a hot oven. Add a fresh squeeze of lime and a little extra flaky salt just before serving again.

Health benefits and easy swaps

Sweet potatoes bring fibre, potassium and a hefty amount of vitamin A, which makes them a very handy side dish when the rest of the plate is leaning rich and meaty. Grilling adds flavour without needing much more than a little oil, and the lime keeps the whole thing tasting fresher than a heavier potato side might.

For dietary swaps, this recipe is naturally dairy-free and easy to keep plant-based. You can use avocado oil instead of olive oil if that’s what you have. If you want less sodium, reduce the initial seasoning and rely more on lime and herbs at the end for lift.