In a stainless steel mixing bowl, whip the egg whites, whip to frothy. Continue whipping and stream in the granulated sugar. Whip to firm peaks. With a plastic spatula, fold in the pre-sifted raspberry powder and confectioners' sugar. Fold in vanilla extract and balsamic vinegar.
Spoon meringue into a piping bag fitted with desired piping tube. Pipe on parchment paper to desired disc shape. Place in a preheated 200 degree oven and bake for 2 hours.
Whip the heavy cream and creme fraiche to firm peak. Fold in the dulce de leche. Fill meringue tart shell. Top with fresh picked berries.
*sorbet or ice cream may be substituted