In a small bowl, whip together the softened butter, miso and lemon zest, until light and fluffy. Check the seasoning, add more miso to taste and season with pepper.
Heat a chargrill pan. Brush one side of each slice of bread with olive oil. Toast the oiled side on the grill pan until golden.
Smear a small amount of miso butter on the toasted side of the bread. Top with slices of Huon Smoked Salmon, top with chives and serve.
Note: Ciabatta can be replaced with your choice of crackers.