In A Large Resealable Plastic Bag, Combine The Flour, Salt And Pepper. Flatten Chicken To 1/2-In. Thickness; Place In Bag, One Piece At A Time, And Shake To Coat. In A Large Skillet Over Medium Heat, Brown Chicken In Butter. Stir In Wine Or Broth. Bring To A Boil. Reduce Heat; Simmer, Uncovered, For 12-15 Minutes Or Until Chicken Juices Run Clear. Drizzle With Lemon Juice.