During their prime season, zucchini seem to spring up overnight. What wasn't there yesterday is ready for picking at dawn today. They grow with such abandon that on a dewy morning one might well scream, "Heaven's to Betsy, what am I supposed to do with then?" Pick them, my dear, at once. And enjoy them. Elizabeth David, the celebrated British gastronomic writer, championed the cause of baby zucchini so forcefully that growers actually bowed to her...