Trim the chicken and lay them in a glass baking dish in a single layer.
Spread 1-2 tablespoons of the pesto on top of each chicken breast.
Cut the roma tomatoes into slices approx 1/2" thick and lay 2 slices on top of each chicken breast.
Sprinkle the cheese over the top of the chicken breasts.
Bake at 400?F for 30-40 minutes or until the chicken is done and the juices run clear.
Serve over a bed of rice or a plate of pasta. Enjoy!