MEATBALLS 1/4 cup plain breadcrumbs 1/4 cup whole milk 1 pound 85/15 ground beef 1 tablespoon minced garlic 1 large egg 2 tablespoons parsley, finely chopped 1/4 to 1/3 cup parmesan, grated 1 teaspoon salt, or to taste 1 tablespoon Italian seasoning 1 teaspoon paprika 1/2 teaspoon black pepper 1/2 teaspoon red pepper flakes 1/4 teaspoon onion powder 1 tablespoon olive oil, for coating the pan 8-ounce block mozzarella, cut into small cubes VODKA SAUCE 1/2 cup extra virgin olive oil 1 tablespoon fresh garlic finely minced 2/3 cup tomato paste 1 1/3 cup heavy cream 2 teaspoons red pepper flakes, or to taste 2 teaspoons dried basil salt and pepper, to taste 1/2 cup freshly grated parmesan, more to taste 2 tablespoons unsalted butter