Stir in the tomato sauce, diced tomatoes (with the juice), and 1/2 cup of water.
Add the sugar, oregano, basil, red pepper flakes (if using), and a pinch of salt and black pepper. Stir to combine.
Reduce heat to low and let the sauce simmer for 15-20 minutes, allowing the flavors to meld together. Stir occasionally.
Combine the pasta and sauce:
Once the sauce has simmered, add the drained pasta to the skillet with the sauce. Toss well to ensure the pasta is fully coated with the sauce.
Let the pasta cook in the sauce for 2-3 minutes to absorb the flavors.
Serve and garnish:
Serve the old-school spaghetti hot, and top with grated Parmesan cheese and freshly chopped parsley, if desired.
Pair with garlic bread or a side salad for a complete meal.
Enjoy your hearty, old-school spaghetti! This simple yet flavorful dish is perfect for family dinners or cozy gatherings, bringing a nostalgic touch of classic comfort food.
