I recall my mom making this exact recipe (using raw egg whites). Back 45 years ago, we didn't think a thing of eating the grapes. I vividly remember they looked beautiful/glittery and tasted delicious;however, now, I wouldn't eat grapes covered in raw egg white. ?? go figure .....
I usually use both red and green seedless grapes cut into small clusters and arrange on serving platters. They add so much to the visual appeal, a terrific holiday garnish. Thank you Bergy for a terrific tip!
I used pastuerized egg white that you buy in a cardboard container. I didn't get the grapes covered evenly... probably operator error. But they taste good!