Heat oil in a medium-sized frying pan and sauté onion until golden.

Remove from heat and add remaining filling ingredients. Stir to combine.

On a floured surface, roll out pizza dough and cut circles with a cookie cutter or glass that is about three inches (seven and a half centimeters) wide in diameter.

Oil and flour a 10-inch round baking pan. Working with one piece of dough at a time, place a heaping tablespoonful of filling onto half of the dough and fold the other half over it, forming a half circle. Pull the two ends together and pinch shut, forming a petal shape with dough on the outer and inner sides of the petal. Place into the outer edge of the pan, with the point of the petal facing inward. Repeat with the remaining dough, placing the filled “petals” in a round circle in the pan. When the outer ring is finished, begin an inner ring, and then another ring, until the pan is filled. Place one petal in the center. You can create a small deli roll with the leftover dough and filling.

Spray deli pie with oil spray and bake at 375 degrees Fahrenheit (190 degrees Celsius) for 30–40 minutes or until dough is slightly browned. Serve warm or at room temperature.