1Spray 6-quart slow cooker with cooking spray. In slow cooker, place parsnips and carrots. Top with onions, sweet potatoes and red potatoes.
2In a small bowl, mix oil, vinegar, honey, salt and pepper with whisk. Pour mixture evenly over vegetables.
3Cover; cook on High heat setting 4 hours or until vegetables are tender. Transfer vegetable mixture to serving dish; sprinkle with parsley.