A Classic Eton Mess has three essential ingredients, beautifully ripe strawberries, meringue and whipped cream. It can easily be made with store-bought meringues, for a simple yet lovely dessert, pretty enough for company.The folklore behind the quintessential English dessert, Eton Mess, is that it was created when a group of Etonians, students at that famous school, were headed out for a picnic,