Cut 1 large head broccoli into long spears. Toss with 2 tablespoons olive oil on a baking sheet; season with salt. Roast at 450 degrees F until almost tender, 15 minutes. Toss 1/2 cup breadcrumbs (preferably panko) with 1 cup grated sharp cheddar, 1 bunch sliced scallions, 1 tablespoon olive oil and a pinch of nutmeg. Sprinkle on the broccoli and roast 15 more minutes.