Rub the chicken breasts on both sides with the salt, pepper and garlic and place in an oven safe cooking dish.
Whisk together the rosemary, lemon, vinegar, wine, and olive oil.
Roast the chicken breasts at 425 degrees for 12 minutes. At 12 minutes, begin basting the chicken with the rosemary/wine/olive oil mixture. Baste every 3 minutes until the skin is well browned and the basting liquid is evaporated (about 20 more minutes). Chicken should register an internal temp of 165 F. Let the chicken rest for 8 minutes before slicing.
For the sauce, strain the remaining pan juices into a saucepan, bring back to a simmer and whisk in 2 tablespoons of cold butter. Adjust salt to taste.