Combine egg whites and salt in mixing bowl of electric mixer. Beat at medium speed until opaque and loosely foamy. Increase speed to high and add sugar in a slow stream down side of mixer. Beat until stiff and shiny.
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Comments: Easy way to pipe out disks of a particular size: Trace a plate or other object of appropriate size onto parchment paper. The turn the paper over and use the circles as your guide. Start piping in the center and form a tight spiral out to the edge.
