Yes! Pasta salad gets better as the vegetables soften & flavors meld. So while you can eat it right away, I recommend making it several hours or a day before you need it. If you’re making it ahead of time, you can add 2/3 of the dressing right away, and then add the remaining 1/3 just before serving. Since the pasta will absorb some of the dressing, it will leave you with a saucier & more flavorful pasta salad if you refresh it just before serving.