Stuffing chicken breasts with a tangy cheese mixture is a great way to add flavor. And it couldn't be easier: simply mix together a few ingredients, slit the chicken breasts, push the filling in with your fingers, and saute. To meet the challenge of keeping chicken breast moist, this recipe uses a technique called pan-steaming. After browning one side of the chicken breasts, I turn them over and rest a pot lid that fits inside the frying pan right on top of the chicken. The lid prevents the steam from evaporating completely, keeping the chicken moist, yet because I'm not covering the entire pan, the chicken continues to brown rather than steam. The chicken can be served either with a reduced pan sauce or a ROASTED CHILE-CILANTRO SAUCE. This recipe is fun to play with. Try sun-dried tomatoes added to (or in place of) the olives. In the summer, flavor the goat cheese with fresh herbs such as basil, chives, and mint.