Process beans and water in a food processor until smooth. Transfer to a greased 1-1/2-qt. slow cooker. Add the next 8 ingredients. Cook, covered, on low until heated through, 2-3 hours. Stir in cucumber and yogurt; cool slightly. Sprinkle with additional dill. Serve warm or cold with chips or assorted fresh vegetables., Freeze option: Omitting cucumber, yogurt and additional dill, freeze cooled dip in freezer containers. To use, thaw in refrigerator overnight. To serve dip warm, heat through in a saucepan, stirring occasionally. Or serve cold. Stir cucumber and yogurt into finished dip; sprinkle with additional dill. Serve with chips or vegetables.