This is the easiest pasta salad in the world and it tastes good too. I'm not really a fan of the Mayonnaise goopey stuff, I like a little more on the light side with stuff I can actually taste. This salad can have a million different ingredients. I guess mushrooms would be good, if you like that kind of thing, I personally think they are gross.
1 lb Rotoni pasta (spiral shape) cooked & drained
2 handfuls cherry tomatoes quartered OR 1 large tomato diced
1 can olives sliced
1-1 1/2 c Zesty Italian dressing
1 small container feta cheese
When pasta has been drained allow to cool for about 10 minutes. Add tomatoes, olives, and dressing, toss well to combine. Then add the cheese. If you add the cheese while the pasta is still hot it will melt and get creamy, it's still yummy but it's not really a salad then.
*Like I said you can dress this up in countless ways. One of y favorites is to replace the olives with cucumbers. Another thing you can do is use goat cheese. This is a great alternative if you have a milk allergy.