How can I thin a homemade salad dressing?

I made a homemade salad dressing (poppy seed) substituting greek yogurt for regular yogurt as a base. As a result it turned out too thick 鈥?not pourable. What can I use to thin the dressing without adding too many extra calories or fat?How can I thin a homemade salad dressing?
I would say water or olive oil...
add just a little milk to give you the Constancy that you need.How can I thin a homemade salad dressing?
Olive oil.
add a little buttermilk or olive oil
White wine vinegar? Make it a little sharp though? WHisk well.
I'm thinking you should add olive oil.
water or milk :)