So basically you need pasta, cheese, something crunchy, and a bottle of Catalina dressing. And don't forget the "something crunchy" can be a combo of different things.
Step 1: Ingredients
That's it :)
I have used a "California dressing" when I couldn't get Kraft Catalina (I think it was "Western Family" brand). I've also been caught short with only a half bottle so I read the ingredients list and threw in what I had and sorta made a homemade version. You can use regular instead of calorie-wise but I try to use calorie-wise when I can (gotta keep my girlish figure, you know). You will probably use half to 3/4 of the bottle depending on how much you make.