Add in tomato passata, sugar, and bay leaves. Cover and simmer for 30 minutes until slightly thickened.
300 g Tomato Passata, 1 tsp Sugar, 2 Bay Leaves
In the meantime, bring a large pot of water to a boil and season generously with salt. Cook pasta according to package instructions. Reserve about ½ cup of Pasta Water.
250 g Spaghetti
When ready, toss in the cooked pasta into the tomato sauce, together with the butter and a splash of reserved pasta water. Cook until everything's combined.
1 tbsp Butter
Add the fresh basil and top pasta with Parmesan Cheese. Serve immediately.
8-10 g Fresh Basil
Notes
Italian tomato varieties/brands would be a good pick for good quality tomatoes for the recipe.
Tomato Passata is preferred for the recipe due to its smoother texture. If using tinned chopped tomatoes, you'll have to double the simmering time in order for the chopped tomatoes to break down into a thick sauce. The flavours in tinned chopped tomatoes also tend to be less intense than that in tomato passata.
Add fresh basil only at the end of the cooking process. Otherwise, basil has a tendency to turn bitter when being cooked for too long.
The butter and reserved pasta water help the sauce to bind with the pasta.