Healthier Italian Spaghetti Sauce with Meatballs

Combine 454g ground beef, 200g breadcrumbs, 50g egg, 15g grated cheese, 5g minced garlic, and salt; form into 24 meatballs.

Heat 46g olive oil in a large pan over medium-high heat; brown meatballs in batches until golden, about 2 minutes per side.

Remove meatballs and set aside. In the same pan, sauté 150g finely diced onion and 5g minced garlic over low heat until soft and translucent.