01 - Place bread slices in a toaster and toast until golden brown and crisp.
02 - Halve and pit the avocado. In a small mixing bowl, mash the avocado with lemon juice, salt, and black pepper using a fork or potato masher until mostly smooth but slightly chunky.
03 - Spread the mashed avocado evenly over each toasted slice of bread.
04 - Layer the thinly sliced smoked salmon over the avocado spread.
05 - Sprinkle with chopped fresh dill or chives, and add red pepper flakes and capers if desired.
06 - Transfer to serving plates and garnish with lemon wedges. Serve immediately.