Heat a small amount of oil in a large skillet; fry chicken until browned. Drain, place chicken in a 13 X 9 X 2 inch baking dish. In a saucepan, saute onion in butter until tender; stir in remaining ingredients. Simmer, uncovered, for 15 minutes. Pour over chicken. Bake at 350*F about 1 hour or until chicken is done, basting occasionally. Serves 6 to 8.