Preheat oven to 375℉.
Trim 2 inches off the ends of the broccolini stems and cut any thick stalks in half lengthwise.
Place broccolini on a single layer on two sheet pans. (If you put them on one sheet pan, the broccolini will steam rather than roast.)
Drizzle each sheet pan with 2 tbsp olive oil, sprinkle with 1 tsp salt and ½ tsp pepper. Toss well.
Roast for 15 minutes, until the broccolini is crisp-tender.
Sprinkle lightly with salt and serve hot.