Slice into portions to suit your own and your guests' appetites.
Remarks
If spring onions are out of season, use a normal onion. In this case, add a touch of green, if possible, with some chopped parsley at stage 10.
For the two cheeses, if you don't have Comté or Cheddar, use another cheese of your choice, but preferably a hard-paste type, with a strong flavour, such as Parmesan or mature mimolette.