Watercress

Britain's most celebrated aquatic leaf, and one of the oldest known vegetables consumed by humans. Fresh watercress carries a distinctive, clean peppery heat — sharper than rocket, more mineral than spinach — with a satisfying crunch that wilts the moment it meets warmth. Stir into a classic watercress soup with potato and a swirl of crème fraîche, stuff into a rare roast beef sandwich with horseradish and sourdough, or simply dress with a mustardy vinaigrette alongside a poached egg for a lunch worth lingering over. Nutritionally, it punches well above its weight: gram for gram it is one of the richest sources of vitamin K, vitamin C, and glucosinolates of any leafy green. Priced per bag.