Place all the ingredients except the almonds in the bowl of a mixer fitted with a whip attachment, and whip on medium speed until frothy like a bubble bath, about 1 minute. Turn the mixer to high and continue whipping until the meringue becomes stiff and glossy, about 3 minutes.

Store the meringues in an airtight container until ready to use.

Using a rubber spatula, place large dollops of the meringue on a parchment-lined baking sheet, spaced 3 inches apart so they can expand as they bake.

Sprinkle the meringues with sliced almonds and bake at 225?F for 2½ hours, until they are slightly browned and crisp on the outside but still chewy on the inside.