Very good! I agree it would need more if just having this by itself, but I served as a side to grilled salmon and it was perfect for that. I cut the recipe in half and made it in a smaller skillet. Of course when I flip a frittata when not going to take photos, it comes out clean, but as soon as the camera is mentioned, it sticks to the pan :( But still tasted great! Made for Spring 2012 PAC game.
I had been saving this recipe from the Williams-Sonoma catalog and finally got around to making it today because I had some leeks that I needed to use up. I wish I would have seen your posting about feeling that it needed some more flavor before I made it, as I agree with you. I did add some diced baby bella mushrooms as I needed to use them up. But bacon, or fresh herbs might help give it the extra flavor it lacks.