I've made this salad a few times now. It's very simple and makes a great side dish. I really like it with these stuffed chicken breasts. The original recipe uses a 1 pound package of spaghetti, but I have cut it in half because that makes enough for 2 or 3 meals, since there are just the two of us. I think it would be a great potluck offering, and in that case, I'd say go ahead and double this recipe. You'll be able to feed a crowd.
The original recipe calls for freshly grated Parmesan, which would probably make this even better. Unfortunately, all I usually have is the kind of Parmesan that comes in the green can - but that works pretty well, too.