Calling the classic French onion tart, the cream is incorporated with the onions, not the eggs, which form a custard. This tart is super easy to make, and using an already store-bought pie shell ...

Delia Smith wows with a savoury version of the classic French tarte tatin ... you need to think 'jigsaw puzzle', so that after the onion halves have been placed in the pan to cover the surface ...