What volume or weight is the box of pasta?  I couldn't find a box of pasta.  I ended up buying a one-pound bag of whole wheat rotini pasta.  I cooked the whole thing.  I didn't add Veganaise because when I took it out of the fridge it the oil has separated and the solids looked curdled.  I didn't miss it, so this recipe would be fine for people who don't have access to special vegan ingredients.  I had purple-red to yellow heirloom cherry tomatoes that I cut in half instead of chopping a large tomato.  They looked nice in the salad.  I added fresh dill instead of dried.  I took about half of a small bunch and snipped them with scissors, I added olives (a can of black and a jar of kalamata - I like olives), and I didn't smash the chickpeas because I was running out of time.  I put them through the grater on my food processor.  That made it easy, but next time I'll also use the S blade and make them creamier.  The way I did it they were in small, non-creamy chunks.  If they got good and creamy, I might mix them with the Italian dressing before adding to the salad.

I like this recipe a lot.  The fresh dill and kalamata olives were flavorful additions.  I don't know how much pasta is in a box, but the pound of rotini made a. lot. of pasta.  I kept the recipe-specified amounts of other ingredients and it was fine.

I made this recipe because I'm looking for ways to save money and pasta was a solution.  With the kalamata olives and fresh dill, it might have cost me around $12 to make, but it's pretty much all I ate for five days, so $12 for for nearly a week's worth of food makes this a value, even with the additions.