1
Adjust rack to middle position (middle and top positions for 4 servings) and preheat oven to 425 degrees. Bring a medium pot of salted water to a boil. Wash and dry produce.
Cut broccoli into bite-size pieces if necessary. Trim and thinly slice scallions, separating whites from greens. Mince or grate garlic. Zest and quarter lemon.
Trim and discard woody bottom ends from asparagus. (Save broccoli for another use.)