Simplify the following text for a Grade 11 native English-speaking person.
Original: Garden cress ( Lepidium sativum ) is a fast-growing , edible herb that is botanically related to watercress and mustard , sharing their peppery , tangy flavor and aroma .
Simplified: Garden cress is a fast-growing eatable herb that is related to watercress and mustard , sharing their peppery taste and aroma .