Spray baking sheet with non stick cooking spray. Place frozen rolls with space apart on pan, cover with plastic wrap that has had the underside sprayed with non stick spray too to keep from sticking while rising.
Put in a place that is room temperature to rise for 3 to 5 hours, or until they double in size. Do not over proof.
Preheat oven to 350 degrees F. Remove plastic wrap and discard. Melt butter and very lightly brush on the top. Bake for 15 - 18 minutes, until very lightly browned and middle is no longer sticky.
Remove and brush tops again with melted butter, sprinkle with garlic salt if desired. Serve immediately for best results.