Tip
You may keep the baked sandwiches warm in a 200°F oven up to 30 minutes before serving.
To Make Ahead
Prepare as directed through Step 2, except do not drizzle with melted butter. Cover and chill 2 to 4 hours. To serve, preheat oven to 350°F. Drizzle rolls with melted butter and sprinkle with green onion. Bake 10 minutes or until cheese is melted and rolls are light brown.
