Dainty chamomile flowers garnish our take on vacherin, a classicFrench dessert. The herb also imparts a faintly floral flavor to the poached nectarines that,alongwith tangycreme fraiche, top crisp disks of meringue.
Preheat oven to 200 degrees. Trace a 9-inch circle onto 2 pieces of parchment paper with a pencil. Turn paper over, and place each circle on a baking sheet; set aside.
Put egg whites and salt in the bowl of an electric mixer fitted with the whisk attachment. Beat on low speed until frothy. Beat in sugar, 2 to 3 tablespoons at a time. Gradually raise speed to medium-high; beat until mixture is glossy and stiff peaks form, about 7 minutes.
Spread the meringue evenly onto the parchment-paper circles on baking sheets using an offset spatula. Bake until meringue is dry and crisp, 2 to 2 1/2 hours. Meringue layers can be stored at room temperature, wrapped tightly in plastic wrap, up to 1 day.
Spread half the creme fraiche filling over 1 meringue disk. Top with half of the poached nectarines. Place remaining meringue disk on top. Top with remaining filling and nectarines. Garnish with chamomile flowers, if desired.
Use organic chamomile flowers that haven't been sprayed with pesticides. Although they're safe to eat, we recommend using them just for garnish, so remove them before you eat the dessert.