Jean-Marie used Comté cheese when we cooked in Philadelphia, but you can use aged Gruyère. This is a perfect open-faced sandwich snack, which takes 15 minutes to prepare. A welcome added garnish for the plates would be herb flowers or shredded nasturtiums.
Sprinkle the brioche slices equally with the kirsch. Drizzle the cream over them. Then cover the slices with a 2-inch-thick layer of the grated cheese.