01 - Bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve 1/2 cup pasta water, then drain and set aside.
02 - Heat olive oil in a large skillet over medium heat. Add diced onion and sauté for 3 to 4 minutes until soft and translucent.
03 - Stir in minced garlic and cook for 1 minute until fragrant.
04 - Add tomato paste and cook for 1 minute, stirring constantly. Pour in crushed tomatoes, then add sugar, oregano, dried basil, salt, and pepper. Simmer for 8 to 10 minutes, stirring occasionally.
05 - Reduce heat and stir in heavy cream. Simmer for 2 to 3 minutes until sauce becomes creamy and slightly thickened.
06 - Add cooked pasta to sauce and toss to coat evenly. If sauce is too thick, add reserved pasta water gradually to achieve desired consistency.
07 - Stir in grated Parmesan cheese and adjust seasoning as needed.
08 - Plate immediately, garnishing with extra Parmesan and torn fresh basil leaves.