In a large skillet, saute onion and pepper in butter until crisp-tender. Remove from pan and set aside. Cut ham steak into four pieces. In the same skillet, brown ham on both sides.
Meanwhile, in a small bowl, combine cornstarch and apple juice until smooth; pour over ham. Bring to a boil; cook and stir 1-2 minutes or until slightly thickened. Reduce heat; spread apple butter over ham. Top with onion. Cover and simmer for 5-7 minutes or until heated through.
This recipe was tested with commercially prepared apple butter.