Preheat your oven to 400°F (200°C).

In a large bowl, combine the ground beef, breadcrumbs, Parmesan cheese, parsley, minced garlic, egg, oregano, and a generous pinch of salt and pepper.

Using your hands, gently mix until just combined. Don’t overwork the meat.

Shape the mixture into golf-ball-sized meatballs and place them on a baking sheet lined with parchment paper.

Bake in the preheated oven for about 20 minutes, or until the edges are golden brown.

In a large skillet, pour the marinara sauce over medium-low heat.

Once the meatballs are done, gently transfer them to the skillet, allowing them to soak up the rich flavors for about 10 minutes.

Serve hot with spaghetti, in a sub, or enjoyed straight from the skillet.