Add the tomatoes, salt, pepper, and sugar. As the tomatoes cook and soften, mash them with a fork to help them form a chunky, rustic sauce. Cook the tomatoes for approximately 5-6 minutes total.
Sprinkle with torn basil before serving.
If serving with pasta, transfer the tomato sauce to a bowl with the pasta, and toss to combine.
Add the reserved pasta water, 1/4 cup at a time, until the pasta is moist. Garnish with additional basil, if desired.