Finely chop the tomato, onion, and garlic.
Drizzle olive oil in a pan and sauté the garlic and onion.
Add the tomato and cook over medium heat to make the sauce.
Season with salt and pepper.
Boil the pasta and drain the water.
Add the pasta to the tomato sauce and mix well.
Garnish with parsley and Parmesan cheese to finish.