I have always loved Indian curry's, and make them regularly. Usually they turn out pretty good, BUT whenever I use yogurt it all falls apart. The yogurt always curdles, it doesn't seem to affect the taste but the sauce looks terrible. It has tiny white bits in it from where the yogurt hasn't mixed in with the other liquids. I have tried different brands of yogurt, but the store near me is now only carrying Dannon full fat and fat free. I do follow the recipes as closely as possible, but the result is always the same. Please can someone give me some tips, and explain what I doing wrong.