Peel and chop the onion. Peel garlic. Wash tomatoes, peel, seed and cut them into 1/4-inch dice.
Heat olive oil in a pan and sauté garlic and onion. When golden, discard garlic and add tomatoes. Season with salt and pepper and cook until the tomatoes have dissolved into a sauce.
Boil pasta in plenty of salted water according to package directions. Drain and toss with tomato sauce.
Tear basil leaves by hand and sprinkle over the pasta. Drizzle with olive oil, if desired.
