Preheat oven to 400 degrees F. Coat a large baking sheet with nonstick cooking spray. Sprinkle work surface with a pinch of flour or cornmeal to prevent dough from sticking if desired. Unroll dough onto work surface and cut into 4 pieces.
In a small bowl, mix together Heinz 57® and spinach dip until smooth. Spread about 1/4 cup of Sauce mixture evenly on each piece of dough, leaving 1/2-in. around the edge. Arrange 1/2 cup of chicken and 2 Tbsp. of pepper onto one half of a dough piece. Gently fold dough over the filling to form a triangle shape. Seal the edges by crimping with fingertips or with a fork. Cut 1 or 2 slits on top of crust. Repeat with remaining dough pieces. Transfer turnovers to baking sheet and lightly coat with nonstick cooking spray.
Bake for 12 to 15 minutes, or until golden brown. Serve immediately.
TIP: If desired, add your favorite vegetables such as chopped tomatoes, sliced onions, roasted peppers or sliced mushrooms, to the filling.