Arrange a rack in the middle of the oven. 

Preheat the oven to 350°F. 

Position the rolls in a baking dish or put them on a baking sheet. 

Brush them with melted butter and don't forget to sprinkle a dash of salt. 

Cover the rolls with a single layer of aluminum foil or leave them as is. 

Heat them up for about 7 to 10 minutes.