Cover a baking sheet with a Silpat or parchment paper. Unroll 1 sheet of puff pastry, fold up sides to form an edge, dock the base pastry with a fork, brush with butter and sprinkle with sugar. Bake in oven for 15 minutes or until golden brown.
While the pastry is baking, mix all of the cheesecake ingredients together with a hand mixer on medium high until smooth and creamy. Chill in the refrigerator for 30 minutes.
To assemble, spread the cheesecake mixture over the puff pastry evenly. Add strawberries and raspberries and sprinkle with powdered sugar and serve.
Recipe by jessica burns at http://jessicaburns.com/2014/04/easy-berry-cheesecake-tart/