Boil spaghetti in salted water until al dente, reserving 0.33 cup pasta water.
Heat extra virgin olive oil in a skillet over low flame.
Add garlic paste and red chili flakes; sauté gently for 2 minutes until garlic turns pale golden.
Add cooked spaghetti, black pepper, and reserved pasta water to the skillet.
Toss continuously over medium heat for 2 minutes, garnish with torn basil, and serve immediately.