Chocolate Pavlova with Mascarpone Cream & Raspberries

Bahan-bahan (10 porsi)

• 6 large egg whites
• Pinch salt
• 1¾ cups superfine sugar ((see note))
• 3 tablespoons natural unsweetened cocoa powder, (such as Hershey's)
• 1 teaspoon red wine vinegar
• 2 ounces bittersweet chocolate, (finely chopped)
• 8 ounces (1 cup) mascarpone cheese, cold
• 1½ cups heavy whipping cream, (cold)
• ¼ cup sugar
• 1 teaspoon vanilla extract
• 1½ cups fresh raspberries
• 2 ounces bittersweet chocolate, (grated or shaved into curls (optional))