Prepare the pizza dough to the end of proofing. Divide into 6 equal pieces.
In a small bowl, combine ricotta, parsley, garlic powder and half of oregano.
Add ingredients for marinara dip to a sauce pan over medium heat. Bring just to a bubble and then reduce to low to simmer until ready to serve.
Preheat oven to 425degF.
On a lightly floured surface, flatten out one portion of dough to a circle. Spread a portion of ricotta mixture on half of dough. Top with pepperoni and then mozzarella. Fold other half of dough over top and twist the dough around the edges to seal. Place on a parchment paper covered baking rack. Repeat with remaining calzones. (You will need to use two baking trays)
Melt butter and brush over top of each calzone. Sprinkle with parmesan cheese and remaining oregano. Place in oven to bake for 18 minutes. Remove and serve with marinara dip on the side.