Immerse the eggs in boiling water and count, depending on their size, 5 to 6 minutes cooking time after the water returns to a boil. Immediately shock them in cold water.
Slice the zucchini into ultra-thin slices using a mandoline and mix them with the juice of half a lemon.
Dressing: mix the lemon juice with the other ingredients.
Toast the cashews over moderate heat in a large non-stick pan, without adding any fat. Add the olive oil, then gradually add the spinach. Let it wilt, seasoning with pepper, salt, and a bit of nutmeg.
Toast the slices of bread in the toaster or in the oven. Cut the salmon into small, thick slices and quickly mix them with some dressing.
Top the toasts with spinach, cashews, salmon slices, and zucchini slices. Drizzle them with a few drops of dressing. Place 1 egg on each toast and lightly cut the eggs so that the yolk runs out. Give it another twist of the black pepper mill and serve.