Preheat oven to 375. Pat chicken dry with a paper towel and sprinkle taco seasoning generously over both sides of the chicken breasts. Place chicken in a baking dish. Cook for 25 minutes or until internal temp reads 165F.
While chicken is cooking, rinse and tear apart romaine lettuce. Divide between plates. Cut tomatoes into wedges and chop cilantro. Sprinkle ingredients on dinner plates.
Once chicken is cooked, let cool and chop. Add to salad plates. Add fat-free plain Greek yogurt. Add other ingredients as desired such as salsa, avocado or reduced fat cheese.