Preheat the Oven: Preheat your oven to 212°F (100°C). Line baking trays with parchment paper.
Make the Meringue: In a stand mixer, combine egg whites and 1 ¾ cups sugar. Whisk on low speed (setting 2) for about 5 minutes until small bubbles form. Increase to high speed and continue whisking. Gradually add cornstarch and vinegar.
Finish the Meringue: While continuing to whisk, slowly add the remaining ¼ cup sugar, a tablespoon at a time, until the meringue is firm and stiff.
Incorporate Chocolate: Drizzle melted chocolate over the meringue. Gently fold the chocolate in. Spoon large dollops of meringue onto the prepared trays. Continue folding in chocolate and scooping until all the mixture is used.
Bake: Place the trays in the oven and bake for about 2 hours, or until the meringues can be easily lifted off the parchment paper without sticking.
Prepare the Caramel Sauce: In a medium pan over medium heat, melt 1 cup sugar until it turns into a deep golden brown caramel. Carefully add the butter, being cautious of bubbling. Mix well. Gradually add the cream, again being careful of spitting. Stir in the sea salt.
Assemble the Pavlovas: Whip the ½ cup of cream until stiff peaks form. Dollop whipped cream onto each meringue. Top with caramel sauce and sprinkle with honey-roasted peanuts.