Well I have a spinich one too but its a little different to the one Genuinesqueek posted,

I love love love this one it is just so moreish and I am telling you once you start you cant stop even if your not a huge spinach fan LOL

Combine equal amounts of:
S&W whole egg mayonnaise ( has to be S&W or its not quite the same )
Light sour cream

Add to taste:
Spring onion soup mix ( I think this is actually called french onion soup mix as I have yet to find a spring onion soup mix )
(start with only a small tspn & add gradually as can overpower dip really quickly allow dip to sit in fridge for a little while before adding more as it often gets stronger in flavour the longer its left)

Add:
1 can finely sliced water chestnuts
I pkt cooked (drain really well of water once cooked) & cooled frozen spinach

I highly recomend this one cant rave about it enough and now I am wanting to go to the shop to make it LOL *drool drool *

Enjoy

and OMG how yummo do some of these sound I am deffinately going ot be the dip queen at the next party I go to hehehehehe