In a large resealable plastic bag, combine the flour, salt if desired and pepper. Add the cutlets, two at a time and shake to coat. In a skillet, cook cutlets in butter for 2-3 minutes on each side or until lightly browned.
Meanwhile, in a skillet, saute mushrooms in oil until tender. Add garlic and rosemary; cook and stir for 1 minute. Add the tomatoes, wine or broth, brown sugar, salt if desired and pepper; cook and stir for 5 minutes. Stir in butter and basil. Serve cutlets with sauce. Sprinkle with lemon juice and parsley.