In a large skillet, saute sausage in butter for 3-4 minutes or until lightly browned. Add the potatoes, onion and apple; saute 4-5 minutes longer or until apple is tender and potatoes are golden brown. Stir in the vinegar, sugar and caraway seeds.
Bring to a boil. Reduce heat; simmer, uncovered, for 2-3 minutes or until heated through. Sprinkle with parsley.