Ingredients
Method
Preparation
- Peel and slice the onions thinly for even cooking.
- In a large skillet over medium heat, melt butter until bubbly. Add the sliced onions and cook until translucent and caramelized, about 15 minutes.
- Pour in the heavy cream and sprinkle in fresh thyme, stirring well. Simmer gently for about 5 minutes until slightly thickened.
- In a bowl, combine grated Gruyère and Parmesan cheese with bread crumbs.
- Transfer the onion mixture into a greased baking dish. Evenly sprinkle the cheese-bread crumb mixture on top.
- Preheat your oven to 375°F (190°C) and bake uncovered for about 30 minutes until golden brown and bubbly.
Nutrition
Notes
Choose sweet onions for optimal caramelization and flavor. Slice onions evenly for uniform cooking.
