This Lemon Buttercup Pie was a staple of the Miller & Rhoads tearoom in Roanoke, Virginia, where it was a popular choice among the ladies who shopped at the store.

"That's my secret to a long life: custard, custard, custard; rhubarb from the garden and custard," said Mr Lemon, a great-great grandfather, from Aylesbury, Buckinghamshire. "You can't beat it.

A creamy lemon tart filling made with egg yolks, lemon zest, butter, and boiled sugar for a rich texture and vibrant citrus flavor—no baking required.