Preheat the oven to 250°F (120°C). Line a baking sheet with parchment paper.
In a clean mixing bowl, beat the egg whites until soft peaks form.
Gradually add the sugar, one tablespoon at a time, beating well after each addition until stiff peaks form.
Gently fold in the vanilla extract, vinegar, and cornstarch.
Spoon the meringue onto the prepared baking sheet, forming six small nests.
Bake for 1.5 hours, then turn off the oven and let the meringues cool completely inside.
In a separate bowl, whisk together the coconut cream, lemon juice, and powdered sugar until smooth.
Top each meringue with a dollop of lemon coconut cream before serving.