Preheat oven to 425 degrees Fahrenheit.In a large bowl whisk together the oil, garlic, egg, garlic powder and salt.Add the green beans and toss until fully coated with the egg mixture.Sprinkle the Parmesan cheese on the green beans.Spread the beans out on a foil-lined baking pan.Bake for 15-17 minutes.Place under broiler for 2 minutes.