Place all the berries (cut strawberries into bite sized pieces) in a large bowl and sprinkle with 1-2 Tbsp. sugar. Stir to combine and leave to macerate for about 15-30 minutes.
In bowl of your electric mixer (or with a hand mixer or wire whisk) beat the mascarpone, heavy whipping cream, confectioners' sugar (or to taste), and vanilla extract just until soft peaks form.
Take four wine or parfait glasses and layer the berries with the cream. Garnish with a sprig of fresh mint, if desired. If not serving immediately, they can be covered and stored in the refrigerator for several hours.
Makes about four servings.