Preheat oven to 400°F (200°C).
Line a baking sheet with parchment paper.
Combine beef, pork, egg, and breadcrumbs in a bowl.
Add onion, garlic, salt, pepper, and Worcestershire sauce.
Mix gently until just combined.
Form small, even meatballs by hand.
Place meatballs on the prepared baking sheet.
Bake for 20 minutes until golden brown.
In a saucepan, add cranberry sauce and ketchup.
Stir in brown sugar, vinegar, and soy sauce.
Cook over medium heat until slightly thickened.
Add baked meatballs to the sauce.
Simmer for 10 minutes, coating each meatball well.
Serve warm with extra sauce on top.