Though not particularly common in most herb gardens these days, rue can add a bit of bitter and bring balance to a dish gone too sweet or salty. Pennyroyal looks like mint and has a similar, zingy taste. Mugwort is tart. Tansy flowers into perfect yellow buds. Parsley is likely in your refrigerator right now, wilting a bit in your crisper drawer. But these herbal or food- and beverage-based abortifacients aren’t relics of the past. There are plenty of indications that the use of food to