Brush the slices in a small amount of olive oil and and drop gently around the pan some garlic herb seasoning. After the slices are quite crispy remove it.
Boiled the eggs during 5 minutes then cut each one in 3 slices.
After taking away all the hot bread in the pan, place 3 dices of feta cheese on one slice of bread. Repeat for another one. So you should have 2 slices of bread and 6 dices in total. Let it melt a bit and use a spoon to spread easily the rest.
Take one avocado, cut it half, and crush everything in a pot. Add the garlic powder, the Chili flakes, and a bit of salt. You should smell the garlic , and the avocado much more because of the garlic who intensified the flavour. Apply the all on two slices(not the ones with the feta)
With some fresh young spinach leaves, mixed the all with the balsamic vinegar.
Separated 2 nice slices of smocked salmon.
Final step. You should have 2 slices of bread with avocado mixture on it. Place on top of it the 3 sliced eggs and a nice amount of spinach mixed with the balsamic vinegar,add on top the salmon, then finally place the last slice of bread with feta on it. Pressed the two sandwich in a firm move.