Toast the 2 slices of whole grain bread until golden and slightly crisp; set aside on a plate.
Cut the 1 ripe avocado in half, remove the pit, scoop the flesh into a small bowl, add 1 teaspoon lemon juice and a pinch of salt and a pinch of black pepper. Mash with a fork until mostly smooth.
Evenly spread the mashed avocado over the two toasted bread slices, dividing it between them.
Arrange the 4 ounces smoked salmon (sliced) on top of the avocado, distributing it evenly between the two toasts.
Top the salmon with the thinly sliced pieces from the 1/2 English cucumber, distributing the slices evenly.
Drizzle the 1 teaspoon extra-virgin olive oil over the assembled toasts.
If using, add sliced red onions and microgreens on top.
Serve immediately with an optional lemon wedge for squeezing over the toast.
Notes
8. Serve immediately with an optional lemon wedge for squeezing over the toast.