Preheat your oven to 400°F (200°C).
In a large mixing bowl, combine the ground beef, ground pork, breadcrumbs, Parmesan cheese, chopped parsley, chopped onion, minced garlic, salt, black pepper, thyme, and the beaten egg. Mix until all ingredients are well incorporated.
Use your hands to form the mixture into meatballs, approximately 1 inch in diameter. Place the meatballs on a baking sheet lined with parchment paper.
Bake the meatballs in the preheated oven for 20 minutes, or until they are cooked through and reach an internal temperature of 160°F (70°C).
While the meatballs are baking, prepare the cranberry sauce. In a skillet over medium heat, combine the cranberry sauce and Worcestershire sauce, stirring until heated through.
Once the meatballs are done baking, add them to the skillet with the cranberry sauce. Stir gently to coat the meatballs in the sauce and heat for an additional 5 minutes.
Serve the cranberry meatballs warm, garnished with additional parsley if desired.