Crispy Chicken Meatballs

Name: Crispy Chicken Meatballs
Ingredients: 1/2 cup freshly grated Parmesan; 1/4 cup chopped fresh Italian parsley; 2 tablespoons whole milk; 3/4 teaspoon kosher salt; 1/2 teaspoon dried oregano; 1/4 teaspoon red pepper flakes; 1/4 cup panko breadcrumbs, plus 1 cup for breading; 3 large eggs, lightly beaten; 1 pound ground chicken, 50/50 white and dark meat; 4 ounces mozzarella, diced into 1/2-inch cubes; 1/2 cup all-purpose flour; Vegetable oil, for frying; Marinara, warmed, for serving, optional