Preheat oven to 400°. Lightly coat a baking dish with olive oil.
If chicken breasts are thick and uneven, place in a plastic bag and pound to about ½ inch thick with a mallet (I use my rolling pin). Place on baking dish.
Evenly spread basil pesto over each chicken piece and place tomato slices. Season with salt and black pepper, to taste.
Place slices of mozzarella on top of tomatoes and sprinkle with Italian seasoning and Parmesan cheese.
Place in pre-heated oven and bake for 20-25 minutes or until chicken is cooked through.