Preheat your oven to 450*F. Place the asparagus in a 3 quart rectangular baking dish. Drizzle with olive oil and sprinkle with the Parmesan cheese. Roast uncovered, about 15-20 minutes or till crisp-tender(or done to your taste). Use tongs to lightly toss 2 times during cooking.
Meanwhile, in a small bowl, combine butter, radishes, chives, and lemon juice. Transfer asparagus to a warm serving platter. Serve with butter mixture.