4 egg whites
Whisk sugar and egg whites in a double boiler until it reaches 160*. Remove from heat and pour in a mixing bowl. Using a wire whisk, beat for 10 minutes.
Change to a mixing paddle and slowly add:
2/3 cup Earth Balance Margarine, organic shortening, or coconut oil
1 teaspoon vanilla
1/8 to 1/4 teaspoon sea salt
Chill and warm it up when you are ready to spread it on your cake.
You can add some fresh or dried fruit to use as a filling for a layered cake.