In a skillet, saute the onion, celery and almonds in butter. Add rice, sugar, salt, thyme and orange zest; mix well. Loosely stuff hens. Place, breast side up, on a rack in a shallow baking pan. In a small bowl, combine glaze ingredients; spoon some over hens. Bake, uncovered, at 350° for 40 minutes. Cover and bake 40 minutes longer until juices run clear, brushing often with remaining glaze.