Step 1

Prepare an outdoor grill for direct grilling over medium-high heat.

Step 2

Trim the stem end off the cauliflower, cutting off only any browned parts and leaving the leaves intact. Place the cauliflower upright on the cutting board and cut in quarters to form wedges. Place the wedges in a large microwave-safe bowl and season with salt. Add enough water to come ½ inch up the sides of the bowl. Cover with plastic wrap and poke a hole in the top. Microwave until it starts to turn translucent and a paring knife slides through with some resistance, 3 to 5 minutes. Uncover and drain the water from the bowl.

Step 3

Drizzle the oil over the cauliflower, rubbing it on to evenly coat. Sprinkle all over with salt and pepper. Place the wedges cut side down on the hot grill grate. Grill until grill marks appear and the wedges release easily from the grate, 6 to 7 minutes. Flip to the other cut side and grill until tender inside, 5 to 7 minutes. A paring knife should slide through easily. You can char the floret side too for a few minutes. Transfer to a serving platter and serve hot, warm or room temperature.