Preheat oven to 375°F.
Unroll both cans of dough. In ungreased 9x13 pan, place dough; press in bottom and up sides to form crust.
Bake 13 to 17 minutes or until golden brown. Cool completely, about 30 minutes.
In small bowl, mix cream cheese, sour cream, dill and garlic powder until smooth. Spread over crust. Top with vegetables. Sprinkle feta cheese over top and then drizzle with balsamic reduction, if desired.
Serve immediately, or cover and refrigerate 1 to 2 hours before serving. Cut into 8 rows by 4 rows.