Fry onion till brown (use butter) add chopped leeks till transparent the chopped spuds and cover with hot water
variations include the use of 3 leeks, addition of fenugreek, chives or add feta cheese at the end to let it melt.
the best i have ever had was butternut squash, ameraetto and truffle oil. haven't got time to write it out but you got enough time to trial by error it.
with all soups serve with** really thick slabs or crispy** bread.. its this bit that really makes it ;)
yuuuuuuuuuuuuuuuum!