This was my first experience with roasting zucchini, and I loved it! After tossing the zucchini, oil, etc., I didn't roast it right away, I let it sit for about 30-45 minutes to marinate in the flavors (tossing occasionally). If you are watching calories, there is certainly room to reduce the oil. You could easily omit the oil that is used when toasting the pine nuts, and the oil tossed with the zucchini prior to roasting could possibly also be reduced. The recipe is adapted from the Food Network Kitchens.