Slice the avocados.
Spread a generous amount of the miso mayonnaise over each toasted sourdough slice.
Top each slice with an even portion of the avocado slices.
Sprinkle 1 tablespoon of hemp seeds over the avocado layer on each slice for an added protein boost.
(Optional) For even more protein, consider adding pan-fried or baked tempeh, tofu, or your choice of vegan meat alternatives on top.