– 1 cup breadcrumbs

Step-by-Step Directions

1. Preheat your oven to 375°F (190°C).

2. In a large skillet over medium heat, cook the sliced onions until they are soft and caramelized, about 20-25 minutes. Stir occasionally to prevent burning.

3. Transfer the caramelized onions to a baking dish and spread them evenly.

4. Pour the beef broth over the onions, ensuring they are well-coated.

5. Sprinkle the shredded Gruyère cheese evenly over the onions.