This is so MY recipe! I have been making it for YEARS. I don't always do it exactly this way, but same idea. Just as good when you just throw the chicken in a casserole dish, pour on the tomatoes, extra garlic (YUM!), sprinkle on the feta and put in the oven. Cook time will vary based on the thickness of your chicken breast. I usually do not use the lemon or the salad dressing, but imagine the dressing would add more flavor.
Good with Shrimp, too!
Try reduced fat feta! :-)