Put raw sliced onions in casserole. 3 ingredients later: Comfort food you didn’t know you needed

Transfer the caramelized onions to a baking dish and spread them evenly.
Pour the beef broth over the onions, ensuring they are well-coated.
Sprinkle the shredded Gruyère cheese evenly over the onions.
Top with breadcrumbs, spreading them out to cover the cheese layer.
Bake: Bake in the preheated oven for 20-25 minutes, or until the cheese is bubbly and the breadcrumbs are golden brown.
Serve: Allow to cool slightly before serving.
Tips & Variations:
Onion Choice: Use sweet onions like Vidalia or Walla Walla for an extra touch of sweetness.
Cheese Swap: Experiment with other cheeses like Gruyère, Fontina, or even a blend of cheeses.
Herb Infusion: Add a pinch of thyme or rosemary to the caramelizing onions for extra flavor.
Crouton Topping: Use store-bought croutons or make your own for a crispy topping.
Enjoy this simple yet satisfying 4-Ingredient French Onion Bake!