Combine all of the ingredients in a large heatproof mixing bowl
Set the bowl directly in a wide skillet of barely simmering water. Stir the mixture with a spatula, scraping the bottom to prevent burning, until the mixture is very hot to the touch and the egg whites have thickened slightly and turned from translucent to opaque, about 5 to 7 minutes.
Set the batter aside for 30 minutes to let the flavours to meld.