Chicken and Potatoes Italiano

INGREDIENTS:
4 boneless, skinless chicken breasts
4 medium potatoes
1 medium onion, chopped
1/4 cup olive oil
1-2 Tbsp. Rosemary leaves
2 cups pasta sauce
Mozarella cheese slices
Salt and pepper to taste

INSTRUCTIONS:
Spray a 9x13" casserole dish with non-stick spary.  Place the chicken in the center of the casserole dish.  Place the potatoes and onions in a medium bowl.  Drizzle with olive oil and stir to coat.  Place the potatoes and onions around the chicken in the casserole dish.  Sprinkle the Rosemary leaves on to of the chicken.  Sprinkle all with salt and pepper.  Bake at 400 for 20-25 minutes.  Stir the potatoes and onions, then bake another 15-20 miutes until the chicken is cooked through.  Remove the dish from the oven and top the chicken with the pasta sauce and mozarella cheese.  Return the dish to the oven and broil until the cheese is melted.