A decadent dessert of unexpected flavours – fresh, classy – almost dreamy.
Combine vinegar, 2 teaspoons sugar, and lemon juice in heavy small saucepan. Stir over medium heat until sugar dissolves.
Boil until syrup is reduced to scant 1/4 cup, about 3 minutes. Transfer to small bowl; cool completely. (Can be made 2 days ahead. Cover and refrigerate.)
Combine mascarpone, cream, vanilla, and 2 tablespoons sugar in medium bowl. Whisk until thick soft peaks form.
Cover and refrigerate up to 4 hours.
Combine berries and remaining 2 tablespoons sugar in large bowl; drizzle with balsamic syrup and toss to blend. Let stand 30 minutes, stirring occasionally.