Ingredients
4 large egg whites, room temperature
3/4 cup packed light-brown sugar
Pinch of kosher salt
1/4 cup granulated sugar
1 teaspoon distilled white vinegar
1 teaspoon pure vanilla paste or extract
1 cup granulated sugar
1/4 cup fresh lemon juice (from 1 to 2 lemons)
1 teaspoon pure vanilla paste or extract
3 peaches (1 pound), halved and pitted
1 cup heavy cream
1 tablespoon granulated sugar
Preparation
Pavlova: Preheat oven to 300°F with a rack in center. Line a baking sheet with parchment. Using an overturned bowl or cake pan as a guide, trace an 8-inch circle on parchment; turn parchment marked-side down.
Place egg whites, brown sugar, and salt in the bowl of a mixer fitted with the whisk attachment. Beat on low speed until well combined and no lumps of sugar remain. Increase speed to medium; beat until soft peaks form, about 9 minutes. With mixer running, gradually add granulated sugar. Continue beating until peaks are stiff and glossy, about 2 minutes more. Beat in vinegar and vanilla.
Secure marked parchment to baking sheet with a small dollop of meringue under each corner. Using a rubber spatula, spread remaining meringue onto marked 8-inch circle; form peaks around edge and a well in center. Bake until meringue is crisp around edges and just set in center, about 1 hour and 15 minutes. Turn off oven and let cool inside 2 hours. Transfer sheet to a wire rack; let stand until meringue is cool enough to handle. Carefully peel meringue off parchment and let cool completely on rack.
Poached peaches: Meanwhile, prepare an ice-water bath. In a saucepan, combine granulated sugar, lemon juice, vanilla, and 2 1/4 cups water. Bring to a simmer over medium-high heat and cook, stirring, until sugar has dissolved. Add peaches (cut-sides up) and cover with a parchment round to keep them submerged. Reduce heat to low and simmer until peaches are tender when pierced with the tip of a knife, 8 to 10 minutes.
Transfer peaches to a plate with a slotted spoon. When cool enough to handle, peel, discarding skins. Bring poaching liquid to a boil; cook until thickened and reduced by half (you should have 1 cup), about 10 minutes. Transfer to a medium bowl and chill in ice bath until cold.
Topping: In a bowl, beat heavy cream with granulated sugar on medium speed until stiff peaks form. To assemble, carefully place meringue on a serving platter. Spoon whipped cream on top, spreading to edges; then add peaches, cut-sides down. Drizzle with syrup, slice into wedges, and serve immediately.
