In a double boiler, combine egg whites, sugar and salt. Whisk over simmering hot water until the sugar dissolves and the solution is warm to touch (follow the pictures below).
Remove from heat. Transfer it to a mixing bowl. Beat this mixture until it form a stiff peak for approximately 8 minutes.
Spoon the meringue into a piping bag fitted with a large star tip
Pipe about 1 1/2″ kisses onto the baking sheets. Bake it for 1 hour. Turn the oven off and leave the kisses for another hour in the oven.
Place a cup of candy melts in two separate bowls. Add vegetable shortening to each of them and microwave for 30 sec. Stir it once and microwave again for 30 sec until they have completely melted.
Line the counter or tabletop with parchment paper.
Dip cooled kisses into melted candy melts. Place it on the parchment and cool completely