Ingredients
Equipment
Method
- Place sliced onions in the slow cooker. Add olive oil, butter, and salt. Toss gently to coat.
- Cook on low for 6–8 hours or until onions are deep golden and tender. Crack the lid during the last hour if needed.
- Stir in white wine or broth and cook 20–30 minutes to reduce slightly.
- Cook pasta according to package directions. Add drained pasta to the slow cooker and toss gently with onions.
- Stir in Parmesan, adjusting with pasta water as needed for a silky sauce.
Nutrition
Notes
Crack the lid during the last hour to deepen the caramelization if the onions release excess moisture.