Boil the pasta according to package instructions. Reserve 2 cups of the pasta cooking water, then drain the cooked pasta and set aside.
While the pasta cooks, warm the olive oil over low-medium heat. Add the garlic and cook for 1-2 minutes, until fragrant, stirring constantly.
Pour in the tahini, lemon juice, red chili flakes, reserved pasta water and salt. Stir well.
Now add the cooked pasta and mix. Add the fresh basil and halved tomatoes and mix into the creamy pasta.
If the pasta gets too dry, add a bit more warm water. Serve immediately.
