In a cast iron skillet or in a toaster, crisp the bread until evenly brown
Allow to cool while you mash the avocado and sprinkle with salt
Place the toast on a plate, spread evenly with mashed avocado and three slices of smoked salmon each.
Cut the toast in half so you have four pieces total.
Using a microplane or fine cheese grater, shave the hard boiled egg over the toast and sprinkle with ‘everything but the bagel’ seasoning and squeeze with fresh lemon juice, if using.