Spinach Dip

  2 pkg spinach  
1 can water chestnust
(You HAVE to have these they are
soooo gooood in this) 
1 cup sour cream  
1 cup plain yogurt  
1 cup finely chopped green onion 
1/2 tsp salt  
1/4 tsp pepper  
1 clove garlic  
1/2 tsp tarragon (opt for me) 
1/2 tsp dry mustard 

  Mix & refrig 1 hour 
This is a good one that we really enjoy "scarfing" down.
If you want to get a little fancy serve it in a round loaf of bread.