If you want to add more protein for satiety, you can add more chickpeas. Keep in mind that you might need more pesto if you add too many chickpeas, to avoid a dry pasta salad. You can also use a chickpea or lentil pasta instead of wheat pasta. Another option, if you don't mind the extra prep time, is to serve this pasta salad with crispy tofu. I also love to serve this pasta salad with a sprinkle of nutritional yeast for flavor, which also adds a bit of protein.