01 - Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package instructions until al dente. Drain through a colander, reserving ½ cup of the starchy pasta water for later use.
02 - While the pasta cooks, heat 2 tablespoons of olive oil in a large skillet over medium heat. Add the minced garlic and finely chopped onion, sautéing until fragrant and translucent, about 3 to 4 minutes.
03 - Stir in the crushed tomatoes, sugar, dried oregano, red pepper flakes, salt, and black pepper. Bring to a gentle simmer and cook uncovered for 10 to 15 minutes, stirring occasionally, until the sauce thickens slightly and the flavors meld together.
04 - Add the drained pasta directly to the skillet with the tomato sauce. Toss thoroughly to coat every strand or shape, adding splashes of the reserved pasta water as needed to achieve a silky, cohesive consistency.
05 - Remove the skillet from heat. Fold in the torn fresh basil leaves and grated Parmesan cheese, then drizzle with 1 tablespoon of olive oil for a glossy finish.
06 - Divide among warmed plates or bowls immediately. Garnish with additional Parmesan and fresh basil leaves if desired, and serve alongside crusty bread or a simple green salad.