Preheat oven to 350 degrees and generously grease a 6 cup muffin pan.
Unroll pie crusts and cut 12 circles. Make sure at least 6 circles are large enough to fill the muffin pan and leave an edge that hangs over.
In a mixing bowl, add the ricotta, 2 eggs, mozzarella, and diced meats.
Fill muffin cups halfway with ricotta mixture. Add slice of prosciutto. Fill the rest of the crust with ricotta mixture and finish with another slice of prosciutto.
Add the other half of pie crust on top. Fold under and crimp edges. Cut an "x" on top to vent.
Brush the pies with the egg and bake for an hour, or until the crust is golden brown.
Allow to cool slightly, then carefully remove from the muffin pan.
Serve immediately.