Whisk together egg white, molasses, and water. Brush tops of the rolls and dip them in seeds, if desired. Place the rolls on a parchment-lined baking sheet.
Cover with greased plastic and let rise until almost doubled in size, approximately 45 minutes. Meanwhile, preheat oven to 375ºF.
Create a slice down the center of each roll.
Bake for 15 to 20 minutes. The rolls are done when the internal temperature is 190°F on a food thermometer.