Peel whole banana. Lay first crepe flat and spoon chocolate sauce on the crepe, add crushed nuts, and put whole banana on top. Roll crepe around banana. Repeat with remaining crepes.
Take knife and cut each rolled crepe into bite-sized pieces. Insert long toothpicks into each individual piece. Remove to a pretty platter (with toothpicks sticking out)...and drizzle (not soak) more chocolate sauce over your creation. Pass around to your guests.