For the sandwich
01 -
2 thick slices brioche bread, about 2 oz (55 g) total
02 -
1 1/2 tablespoons mascarpone cheese, softened
03 -
1/2 medium ripe banana, sliced into 1/2-inch rounds
04 -
2 teaspoons honey, plus more for serving if desired
05 -
1/8 teaspoon ground cinnamon
06 -
Tiny pinch flaky salt
07 -
4 teaspoons unsalted butter, softened