Cook in the oven for 10 to 20 minutes, until the cheese has melted and is starting to brown.
Serve immediately.
Remarks
Kérinou is a district of Brest, in the Brittany region of northwest France. In keeping with the spirit of the recipe, try to use a French "tome" cheese if possible, preferably from Brittany.
If you like a little more crunch, you can toast the bread before adding the toppings.