In a large bowl, combine the ground beef, ground pork, breadcrumbs, Parmesan cheese, egg, minced garlic, chopped parsley, salt, and black pepper. Mix well until fully combined.

Shape the Meatballs

Using your hands, shape the mixture into meatballs about 1 inch in diameter. Place them on a baking sheet lined with parchment paper.

Bake the Meatballs

Preheat your oven to 400°F (200°C). Bake the meatballs in the preheated oven for 20-25 minutes or until browned and cooked through.

Marinara Sauce

Sauté the Onions and Garlic

In a large saucepan, heat the olive oil over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes. Add the minced garlic and cook for an additional 1-2 minutes.

Add the Tomatoes and Seasonings

Stir in the canned crushed tomatoes, dried oregano, dried basil, salt, black pepper, and sugar. Bring to a simmer and let it cook for about 20 minutes, stirring occasionally.

Combine the Meatballs with Sauce

Once the meatballs are done baking, add them to the marinara sauce and let them simmer together for an additional 10 minutes.

Spaghetti

Cook the Spaghetti

In a large pot, bring 4 quarts of water to a boil. Add 1 tablespoon of salt to the boiling water, then add the spaghetti. Cook according to package instructions until al dente, usually about 8-10 minutes.

Drain and Serve

Once the spaghetti is cooked, drain it in a colander. Serve it on plates topped with the marinara sauce and meatballs.