Boil spaghetti noodles in salted boiling water.
Dice the tomatoes, finely chop the onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add the tomatoes, season with salt and pepper to make the sauce.
Add the cooked noodles to the pan and stir-fry with the sauce.
Garnish with parsley and cheese to finish.