Combine strawberries and sugar in a bowl. Set aside for topping.
Mix mascarpone cheese, 1/4 cup confectioners' sugar, ricotta cheese, and vanilla extract in another bowl. Set aside for filling.
Whip remaining confectioners' sugar and heavy cream together in a bowl using an electric mixer until soft peaks form. Place whipped cream in a pastry bag and refrigerate.
Line up tart shells and fill each one with ricotta cheese mixture. Top each with strawberry mixture and swirl chilled whipped cream on top.
