Heat oven to 375° F. Line a baking sheet with parchment. Heat 1 tablespoon oil in a large skillet over medium-high heat. Add the turkey, onion, garlic, pepper (if using) and cumin and cook, breaking the meat up with a spoon, until browned, add tomato paste and keep cooking for 3 to 5 minutes. Season with ½ teaspoon salt and ¼ teaspoon pepper.
Top the dough with the turkey mixture, fold in half seal the edges using a fork. Place on the prepared baking sheet brush with egg wash and bake until golden, bake for 11-12 minutes.