Darina Allen: Recipes to make with eggs — the great convertible

Aunt Lil's Rhubarb Tart, from Kaelin Whittaker
‘An Apple a day keeps the Doctor away’ was the famous slogan of the 1960s and 70s.
It's no longer so widely used because doctors and dentists nowadays both stress that many of the modern varieties are so high in sugar they are no longer beneficial to our health or our teeth but how about ‘an egg a day keeps us in fine fettle’…