Preheat the oven to 375F.
Lay the chicken side by side in the bottom of a large baking dish, then sprinkle the greek seasoning evenly over the top of each piece of chicken.
Layer on the chopped artichoke hearts, tomatoes, and spinach and then sprinkle the capers, lemon juice and olive oil over it.
Top the dish with the mozzarella and feta cheeses and place on the middle rack of the oven and bake for 35-45 minutes or until the chicken is cooked through and the cheese is browned on top.
Serve hot over rice, pasta, mashed potatoes, or sautéed spinach.
Enjoy!