Preheat your oven to 400F. Grease eight (4-inch) tart pans with nonstick baking spray and set them aside.
Unroll the pie crusts on a lightly floured surface and cut four (6-inch) circles out of the dough.
Press one round of dough into each prepared tart pan, making sure to press the dough into the bottom and sides. Poke the bottom crust a few times.
Cover each pan with parchment. Then fill the tart shell with pie weights, dry rice, or dried beans.
Blind bake for 15 minutes, then remove your pie weights and bake for an additional 5 minutes, or until the crusts are golden brown. Remove to a wire rack to cool completely before filling.
Make the Filling
Heat the cream in a small saucepan (or in the microwave) until steaming.
Add the chocolate and butter to a large bowl. Pour over the cream and whisk until smooth.
Add the vanilla and whisk to combine. Transfer the ganache to the fridge while you bake the crusts - or for at least 30 minutes.
Once the crusts have cooled, spread 2-3 tablespoons of ganache in the center of each crust.
Place the tarts in the fridge until set-- about 1 hour.[mv_img id="72132"]