Spray a 10-inch cast iron skillet with cooking spray. Place frozen rolls in the skillet, leaving plenty of room for rising. Cover and allow to rise for 3 to 4 hours or until fully risen.
After rising, brush rolls with melted butter.
Sprinkle on desired amount of chopped rosemary. Brush with additional butter. Sprinkle evenly with coarse sea salt.
Bake according to roll package directions (usually 350 degrees F. for 15 minutes) or until rolls are a deep golden brown. Serve warm and enjoy!