Boil fusilli pasta in salted water.
Dice the tomatoes.
Finely chop onion and garlic.
Heat olive oil in a pan and sauté the onion and garlic.
Add the tomatoes and mix well to make the sauce.
Add the cooked fusilli to the sauce and toss together.
Season with salt and pepper.
Transfer to a plate and sprinkle with Parmesan cheese.