Preheat oven to 375 degrees. Prepare pastry for double crust pie. Divide dough into two portions. On a lightly floured surface use your hands to slightly flatten one pastry portion. Roll pastry dough from center to educes into a circle 13 1/2 to 14 inches in diameter. Cut five 5-inch circles. Reroll scrapes to cut a 6th circle. Repeat the remaining dough half for a total of 12 5-inch circles. Can use refrigerated unbaked pie crust (2) instead.
For filling, in a medium skillet cook sweet pepper and onion in hot olive oil over medium heat about 4 minutes or until vegetables are tender. Stir in meat and the 1/2 cup barbecue sauce.
Spoon about 2 TBSP of meat mixture onto half of each pastry circle. Top with a rounded tablespoon shredded cheese. Lightly moisten edge of pastry with milk. Fold other half of pastry over the filling. Seal edges by crimping with a fork. Cut slits in pastry to allow steam to escape. Brush pastries with a little additional milk. Place on an ungreased extra-large baking sheet.
Bake for 20-25 minutes or until golden brown. Cool slightly on wire rack. Serve with additional barbecue sauce or sweet-hot mustard for dipping.