Preheat your oven to 400°F (200°C).
In a large bowl, combine ground beef and ground pork.
Add breadcrumbs, Parmesan cheese, beaten egg, minced garlic, and parsley. Season with salt, pepper, and Italian herbs.
Mix until well combined and shape into meatballs, about 1.5 inches in diameter.
Place meatballs on a baking sheet lined with parchment paper.
Bake for 20 minutes until golden brown.
Meanwhile, heat marinara sauce in a saucepan.
Transfer baked meatballs to the sauce and simmer for 10 minutes.
Serve warm over spaghetti or in a sub.