Slow-Cooker Citrus Carrots

In a 3- or 4-qt. slow cooker, combine the first 5 ingredients. Cook, covered, on low 4-5 hours or until carrots are tender., In a small bowl, mix cornstarch and water until smooth; gradually stir into slow cooker. Cook, covered, on high until sauce is thickened, 15-30 minutes. Garnish with fresh parsley if desired.