"Meatballs that get simmered in sauce are always 100% better...."
ground beef
clove garlic, minced
shredded mozzarella
freshly grated Parmesan, plus more for serving
freshly chopped parsley
large egg, beaten
kosher salt
freshly ground black pepper
extra-virgin olive oil
medium onion, chopped
cloves garlic, minced
(28-oz.) can crushed tomatoes
dried oregano
Kosher salt
Freshly ground black pepper