I get the Jamie Oliver podcast and he did this salad not long ago but
the written recipe is not posted to his website--- leastways I could not
find it. I made it last night and it's excellent and very simple:
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3 small raw beets, the fresher the better
a fist full of watercress, cleaned
half a small lemon
extra virgin olive oil
salt & pepper

Peel and then slice the raw beets razor thin on a mandoline. You'll
need an adjustable one with a very sharp blade. Trim any long stems off
the watercress. Put both in an oversized bowl so that you won't get
beet juice all over the place when you mix it. Squeeze the lemon juice
into the bowl and add roughly 3X as much olive oil as lemon juice.
Season to taste, mix well with a gloved hand or tongs and serve. Yum.
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You can see the 1/15/07 podcast (Cooking Steak 2 - Salad) on iTunes even
if you don't have an iPod.

Or you can look to see if it's on his webpage:

<http://jamieoliver.com/>