Chewy salted caramel and chocolate meringues

By Matt Tebbutt From Saturday Kitchen Ingredients For the meringues 100g/3½oz dark chocolate, melted 100ml/3½fl oz caramel sauce 4 free-range egg whites 225g/8oz caster sugar ½ tsp vanilla extract 1 tsp cornflour ½ tsp white wine vinegar 1 tbsp vanilla sea salt flakes (optional) For …