The Best Swedish Meatballs

Name: The Best Swedish Meatballs
Ingredients: 2 slices white bread, torn into chunks (about 2 cups); 1/2 cup milk; 12 ounces ground beef (80/20); 8 ounces ground pork; 1 1/2 teaspoons kosher salt; 1/2 teaspoon ground allspice; 1/4 teaspoon ground nutmeg; 1 large egg, beaten; 1/2 small onion, grated; Freshly ground black pepper; 3 tablespoons unsalted butter; 2 teaspoons fresh thyme leaves, chopped; 3 tablespoons all-purpose flour; 2 1/2 cups low-sodium beef broth; 1/4 cup heavy cream; 1 teaspoon Dijon mustard; 1 teaspoon Worcestershire sauce; 1/2 teaspoon kosher salt; 2 tablespoons chopped fresh Italian parsley; Lingonberry preserves, for serving