Scalloped Sweet Potatoes and Apples

Scrub potatoes. Place in large saucepan. Cover with boiling water. Bring back to boiling. Reduce heat and simmer, covered for 25 minutes. Drain and let cool. Peel and cut into slices ¼ inch thick. Preheat oven to 400 degrees. Melt butter in skillet. Add brown sugar, cider, mace and salt. Bring to boiling. Stir until sugar is dissolved. Simmer uncovered for 10 minutes. In a 2 quart shallow casserole dish alternate potato and apple slices around edge and filling center. Spoon half of syrup evenly over sweet potato and apple. Bake covered with foil 25 minutes. Remove foil, baste, bake uncovered 20 minutes or until glazed.