The Classic German Meatballs You Need to Make

Name: The Classic German Meatballs You Need to Make
Ingredients: 1 medium white onion; 2 teaspoons kosher salt , plus more for seasoning cooking water; 1 bay leaf; 3 tablespoons plain breadcrumbs; 2 tablespoons heavy cream; 1 pound ground pork; 1 pound ground beef; 1 large egg; 3 anchovy fillets , minced; 1 teaspoon freshly ground black pepper; 3 tablespoons unsalted butter; 3 tablespoons all-purpose flour; 1/2 cup heavy cream; 2 tablespoons capers plus 1 tablespoon brine; 1/2 teaspoon kosher salt , plus more to taste; Chopped fresh parsley, optional