Freezing food can be a great money saver and keep foods at their most delicious (just be sure to label and date everything!)
Whisk together whites and yolks until just combined. Measure into an ice-cube tray, using 3 Tbsp. of the mixture per segment (3 Tbsp. is equivalent to 1 large egg). Freeze until solid, then transfer cubes to a freezer bag for up to 6 months. Thaw in the refrigerator.