Crockpot Onion Dip

Turn a 2-quart crockpot to high and add olive oil and butter; let butter melt. Add onions and stir. Turn heat to low and cook for 5-6 hours, stirring twice during cooking time, until onions are browned and caramelized. Stir in remaining ingredients. Cover and cook on low for 2-3 hours until cheeses have melted and dip is blended, stirring once during cooking time. Serve with crudites, crackers, and breadsticks. Keep warm in crockpot on low or 'keep warm' setting for up to 2 hours.