Prepare the spaghetti according to package instructions. Set aside
In a medium large pot, heat the olive oil and fry the garlic for a minute or two. Add the dry red chilli flakes. Fry for 30 seconds. Then toss in the cooked drained spaghetti and mix well. Add in the tahini paste, toss the noodles, and cook on low heat for a few minutes. Mix thoroughly and serve immediately.