Preheat oven to 400F
Spray a medium sized corningware dish lightly with non-stick spray (ie "Pam")
2 whole chicken breasts, boneless/skinless, halved
4 firm but not underripe Roma tomatoes, thickly sliced lengthwise
4-6 tbsps crumbled feta cheese (more if you like more)
thinly sliced red onion
sliced black olives
oregano (dried or freshly chopped works)
Lay the chicken in the corningware so they are not packed tightly, but so there's not a TON of room around them. Cover them with the feta and add pepper to taste, adding sliced olives if you opt for them. Layer the sliced roma tomatoes over this, about one whole per chicken breast (use less if they are large romas or small breasts). Toss red onion over and around chicken, and sprinkle oregano over the whole thing. Cover the dish and bake for 1hr or until chicken is cooked through.
SO freaking good, very simple to make.