Pre-heat your pizza stone, in middle rack of the oven, for half an hour at 500°F.
Stretch or roll your calzone dough into 10-inch rounds; place on a wooden pizza peel that has been sprinkled with cornmeal; the cornmeal will allow the calzone to slide off the peel; ensure the dough round is sliding on the cornmeal base before adding toppings.
Spread roasted tomato jam over half the round leaving a 1-inch border.
Top the tomato jam with the other filling ingredients, ending with the cheese.
Fold the dough over the filling; pinch the edges together by folding the bottom layer of dough slightly over the top crust and pressing to seal.
Brush the tops of the calzones lightly with a simple egg wash of 1 egg whisked with 2 tbsp. water; you will only use a little of this egg wash.
Shake the pizza peel to make sure the calzone is not stuck.
Slide the calzone onto the hot stone, shaking it slightly in a back and forth motion as you slowly retract the wooden peel.
Place in the pre-heated oven and bake for about 10 to15 minutes or until top crust is evenly brown; cooking times will vary depending upon the oven; bottom and top should be nicely browned.
Remove from the oven and allow the calzone to sit for 5 minutes before cutting and serving.