Preparation Preheat oven to 450°F with rack in upper third. Toss together asparagus, potatoes, oil, and 1/2 teaspoon each of salt and pepper in a large shallow baking pan, spreading evenly. Roast, stirring once, 20 minutes. Sprinkle with cheese and roast until cheese is melted and golden in spots, about 3 minutes more.
Preparation Preheat oven to 450°F with rack in upper third. Toss together asparagus, potatoes, oil, and 1/2 teaspoon each of salt and pepper in a large shallow baking pan, spreading evenly. Roast, stirring once, 20 minutes. Sprinkle with cheese and roast until cheese is melted and golden in spots, about 3 minutes more.