Balsamic Chicken and Peppers

4 boneless skinless chicken breasts salt & pepper 4 tablespoons olive oil 4 cups thinly sliced bell peppers (use a mix of colors) 1 medium onion , sliced thin[...]

1 medium onion 2 leeks 2 red peppers low-fat cooking spray (15 sprays) 1 pinch salt pepper 2 sprigs fresh rosemary 1 lb skinless chicken breast , uncooked 1[...]