Bring a large pot of salted water to a boil. Add the 8 oz spaghetti and cook according to package instructions until al dente. Reserve about 1/2 cup of pasta water before draining.
While the pasta cooks, heat a drizzle of olive oil in a large skillet over medium heat. Add the halved cherry tomatoes and cook, stirring occasionally, until they start to soften and release their juices, about 5-7 minutes.
Add the drained spaghetti directly to the skillet with the tomato mixture. Toss together over low heat, adding a splash of reserved pasta water if needed to loosen the sauce and help it coat the pasta beautifully.
Remove the pan from heat, then stir in the chopped fresh basil. The residual heat will gently release the basil’s aroma without wilting it completely.
Transfer to plates or bowls and enjoy immediately. Optionally, drizzle with a little more olive oil or sprinkle with freshly ground black pepper.