Grilled Maui Onions

Maui onions come off the upcountry slopes of Haleakalā around Kula — volcanic soil, cool nights, and a growing season that leaves them low in the sulfur compounds that make an onion bite. That's the whole reason this recipe works: there's almost nothing to cook off. You are not taming an onion here, you are caramelizing one that already tastes like fruit.

The technique that matters is the cut. Slice across the equator into 3/4-inch planks and run a skewer through each one horizontally so the rings can't separate and fall through the grate. Thinner than 3/4 inch and the plank goes limp before it colors; thicker and the center is still raw when the outside is black. Kiawe is the right fire for this — hot, clean, and mildly sweet, so it reads as an extension of the onion's own sugar instead of a layer of ash on top of it.

Ingredients

• 3 large Maui onions (Kula-grown if you can get them), about 2 1/2 lbs
• 2 Tbsp neutral oil or bacon fat
• 2 Tbsp butter, cut into small pieces
• 1 Tbsp shoyu
• 1 tsp rice vinegar or a squeeze of lime
• Coarse salt and cracked black pepper
• Optional: a few drops of chili pepper water, or a pinch of crushed Hawaiian chili
• Metal or soaked bamboo skewers — one per plank

Cook Sequence

1. Build a two-zone fire. Coals banked to one side, two kiawe chunks on top, lid on until the smoke runs thin and blue — 425-450°F over the coals, 325-350°F on the cool side.
2. Peel the onions and cut across the equator into 3/4-inch planks. Skewer each plank horizontally through the rings. Do not push out the centers.
3. Brush both faces with oil, salt and pepper hard. Salt now, not later — you want it drawing moisture to the surface where it can brown.
4. Direct side, 4-5 minutes per side, lid open. You're after dark grill marks and translucent edges, not a uniform brown. Flip once, with a spatula under the skewer.
5. Slide to the indirect side, lid down, 8-10 minutes until a skewer tip slides through the center with no crunch. This is where the sugar actually converts — rushing it on direct heat gives you burnt outside, raw core.
6. Last 2 minutes: butter on top, a splash of shoyu and vinegar over each plank, lid closed so it glazes rather than runs off.
7. Rest 5 minutes tented. Pull the skewers, hit with flaky salt and chili pepper water if you want the heat, and serve them whole — the rings coming apart on the plate is the point.

Round Out the Plate

• Hawaiian Mac Salad — the plate-lunch anchor these belong next to
• Grilled Pineapple Salsa — same fire, and the acid resets the palate between sweet bites