Roughly chop or grate the parmesan. Finely dice the onion. Make a dressing out of the oil, vinegar, onion and parmesan. Season a little with salt and pepper. Halve or quarter the tomatoes and add them. Finally add the rocket and the lukewarm tortellini and mix everything together.
The salad tastes lukewarm best, but it`s not for everyone. It also tastes very good cold. Tastes good with grilled food.