Preheat oven to 350. Arrange chicken in shallow baking dish, dutch oven, or crock-pot. In a small bowl, whisk together the marmalade, mustard, lemon juice, curry powder, and salt. Pour mix over top of meat. Cover and bake 40 minutes. Remove chicken from oven and baste with pan juices. Remove foil. Top with lemon slices and bake 30 min more. Place the chicken on a plate and keep warm.