I do not measure anything besides the pasta and limit the amount of salad dressing (a little goes a long way).

1 cup whole wheat pasta, any cut
Roma tomatoes, sliced
Diced bell pepper
Diced red onion
Black olives
Sliced cucumbers
Sliced mushrooms
Fat Free Zesty Italian Salad Dressing, 3 tablespoons

Put all ingredients in a bowl and toss. Cover and refrigerate for an hour or so; toss again and serve.