In a food processor, combine all ingredients, except egg whites for about 30 seconds.Using a hand held immersion blender, beat egg whites until they form soft peaks about 20 seconds.Add beaten egg whites to the food processor eggnog mixture for about 5-6 pulses.Taste and adjust syrup and seasonings to taste.Chill. This really is best served very well chilled or add ice cubes.Sprinkle fresh cinnamon and nutmeg just before serving.