Parmesan Roasted Green Beans

1 lb fresh green beans washed,dried and trimmed
1 tablespoon olive oil
1/2 teaspoon salt
1/4 teaspoon pepper
1/2 teaspoon garlic powder

Roast at 425ºF for 20 minutes. Remove from heat and sprinkle with 1/4 cup grated Parmesan Cheese