Okinawan Sweet Potatoes

Okinawan families came to Hawaiʻi's sugar plantations beginning in 1900, and the purple sweet potato came with them. It's been a local pantry staple ever since — pale tan skin, violet flesh, drier and denser and less sugary than an orange sweet potato, which is exactly why it takes smoke so well. There's less moisture to fight and less sweetness to bury the kiawe.

Do not wrap these in foil. Foil steams, and a steamed Okinawan sweet potato is a wet purple brick. Naked on the grate at 325-350°F, the skin dries into a thin leathery shell, the sugars weep out at the ends and caramelize black, and the smoke actually reaches the flesh. The moderate temperature matters too — the enzyme that converts starch to sugar works hardest between about 135 and 170°F, so a slower climb through that window is what makes the difference between bland and candy.

Ingredients

• 4 medium Okinawan sweet potatoes (about 2 lbs), scrubbed and dried
• 2 Tbsp neutral oil
• Coarse salt
• Coconut butter: 4 Tbsp softened butter + 2 Tbsp thick coconut cream + zest of 1 lime + pinch of salt, whipped together
• Optional: 2 Tbsp toasted coconut flakes
• Optional: furikake, or a few drops of chili pepper water

Cook Sequence

1. Fire for 325-350°F indirect, two or three kiawe chunks on the coals. Wait for thin blue smoke — heavy white smoke on a bare-skinned vegetable turns it bitter fast.
2. Dry the potatoes completely, rub with oil, salt the skins hard. No foil, no wrapping, no poking a dozen holes — one shallow slit lengthwise is enough to vent.
3. Straight onto the grate on the indirect side, lid down. Rotate at 25 minutes.
4. Cook 50-60 minutes. Watch for sugar bubbling out of the ends and going dark and sticky on the skin — that's the tell that the starch has converted.
5. Pull at 205-210°F when a probe goes through the thickest part with no resistance. Under 200°F they're still chalky in the middle; there's no fixing that on the plate.
6. Rest 5 minutes, split lengthwise, and fluff the flesh with a fork right in the skin.
7. Coconut butter into the hot flesh so it melts in, then flaky salt, toasted coconut, and furikake if you're going savory. Serve them in the skin — that leathery smoked shell is half the reason to cook them this way.

Round Out the Plate

• Hawaiian Mac Salad — the two starches every Hawaiʻi plate wants
• Creamy Coleslaw — cold and sharp against dense, sweet purple flesh