In a large bowl, combine the ground beef, breadcrumbs, grated Parmesan cheese, minced garlic, egg, chopped parsley, salt, and black pepper. Mix well until all ingredients are thoroughly combined.

Form the Meatballs

Using your hands, form the mixture into meatballs approximately 1 inch in diameter. Place them on a baking tray lined with parchment paper.

Cook the Meatballs

In a large skillet, heat the olive oil over medium heat. Add the meatballs and cook for about 8-10 minutes, turning occasionally until browned on all sides.

Sauce Preparation

Sauté the Aromatics

In a separate saucepan, heat the olive oil over medium heat. Add the chopped onion and minced garlic, and sauté for about 3-4 minutes until the onion is translucent.

Add the Tomatoes and Seasonings

Add the canned crushed tomatoes, dried oregano, salt, and black pepper to the onion mixture. Stir well and let it simmer for about 10 minutes.

Combine with Meatballs

Once the meatballs are cooked, transfer them to the saucepan with the tomato sauce. Stir gently to coat the meatballs in the sauce and let them simmer together for an additional 5 minutes.

Finish with Fresh Basil

Before serving, stir in the chopped fresh basil into the sauce for added flavor.