makes about 50
2 egg whites
1/2 cup sugar
2 packed teaspoons finely grated lemon zest
Preheat the oven to 190. Line two cookie sheets with parchment paper.
Place the zest and sugar in the metal bowl of an electric mixer. Rub it together with your fingers until it is well mixed and very fragrant. Add the egg whites. Place the bowl over a pan of simmering water and stir constantly until the sugar is dissolved and the mixture is warm to the touch, 2-3 minutes. Transfer bowl to the mixer and whip (using the whisk attachment) until the mixture holds a stiff peak.
Transfer to a piping bag fitted with a medium sized star or round tip (I like ateco #826) and pipe meringue no bigger than one inch. (Any larger and they may crack while baking). Alternatively, use a large ziplock bag with the corner cut off to pipe the meringues.
Bake the meringues for one hour and thirty minutes, switching the pans from top to bottom and front to back after one hour. At this point the meringues will be set and firm to the touch but may still be a bit sticky. Turn off the oven and let the meringues dry in the over night.