Preheat oven to 400°. On a lightly floured surface, roll dough to 1/8-in. thickness. Using a 4-in. round cookie cutter, cut 12 circles, rerolling scraps as necessary. Press circles onto bottoms and up sides of ungreased muffin cups., Mix sugar and cornstarch; toss with berries and lemon juice. Spoon 2 tablespoons filling into each cup. Bake on a lower oven rack until crust is golden brown and filling is bubbly, 24-26 minutes. Cool 10 minutes before removing from pan to a wire rack; cool completely., For topping, beat cream until soft peaks form. In another bowl, mix lemon curd, sugar, vanilla and 1 tablespoon whipped cream; fold in remaining whipped cream. Spoon over filling. If desired, top with fresh berries. Refrigerate until serving.