Sour Cream Noodle Bake (sour being the key word)

http://www.whitelightsonwednesday.com/2011/12/sour-cream-noodle-bake/

Fail. This recipe is lacking in the flavor department. It was easy to prepare and didn't require a ton of ingredients (always a plus). And it was more than just edible, but really not worth making again. Too bland (as is).

Any ideas on what would really boost the flavor for this dish?