As an intro to this technique, I found a simple sidedish to make out of Tyler Florence's Family Meal cookbook: Parmesan-Roasted Green Beans.
Rimmed baking sheet
1-2 lbs green beans, ends removed
1 cup Parmesan, grated
Salt & pepper
1-2 tsp butter, melted (optional)
Lemon juice (optional)
1. Wash your hands.
2. Preheat oven to 400F degrees.
3. Remove ends of beans.
5. Sprinkle with grated cheese.