Chicken Souvlaki with Tzatziki Sauce

We had an easy Greek dinner tonight. Along with the chicken souvlaki with tzatziki sauce http://find.myrecipes.com/recipes/recipefinder.dyn?action=displayRecipe&recipe_id=698653, I also served a chopped Greek salad (cucumber, tomato, kalamata olive, feta cheese, parsley with red wine vinaigrette), hummus and pita bread. The only thing I did differently with the chicken recipe was to omit the zucchini because I didn't have any on hand. I liked the chicken marinade, it was easy and flavorful, but the tzatziki sauce seemed to be lacking something - maybe some dill or maybe I just needed to salt it more.