- Warm olive oil in a large, heavy-bottomed pot over medium heat. Once you see the oil shimmering, add the chopped onion and sauté for 1 minute, stirring occasionally. Add the minced garlic and pinch of red pepper flake then continue to sauté until onions are soft and translucent, stirring occasionally.
- Add stewed tomato, tomato paste, oregano, basil, parsley, sugar, a few pinches of kosher salt and several turns of freshly ground black pepper, stirring to combine. Bring sauce to a boil, reduce heat to low then simmer, partially covered, for 1 hour.
- Serve with pasta!