WHILE THE PASTRY IS CHILLING BETWEEN FOLDS, MAKE THE FILLING: In a large saucepan over medium heat, brown the ground beef in the oil until cooked through. Drain the excess liquid from the pan and return to the stove. Stir in the tomato sauce, tomato paste, salt, pepper, and garlic powder. Simmer on low for 20 minutes, stirring occasionally. Add in the frozen peas and continue to simmer for 15 minutes. Strain any excess liquid from the mixture and transfer to a medium owl. Allow to cool slightly and stir in the parmesan and mozzarella cheese.