Southern Tennessee Onions Casserole Recipe Easy 2

Instructions

1. Preheat your oven to 375°F (190°C) and grease a baking dish with butter or cooking spray.

2. In a large skillet, melt the butter and olive oil over medium heat. Add the sliced onions and cook, stirring occasionally, until they are soft and golden brown, about 20-25 minutes. The slow caramelization of the onions is key to developing deep flavor in this dish.

3. Once the onions are caramelized, stir in the Worcestershire sauce and season with salt and pepper to taste. Remove the skillet from the heat.

4. In a bowl, combine the shredded cheddar, mozzarella, and Parmesan cheeses. Reserve a small amount of each cheese for topping the casserole.

5. Spread half of the caramelized onions in an even layer at the bottom of the prepared baking dish. Sprinkle half of the cheese mixture over the onions.

6. Add the remaining onions on top of the cheese layer, followed by the rest of the cheese mixture. Ensure an even distribution of onions and cheese throughout the casserole.

7. Top the casserole with the reserved cheeses for a golden, bubbly finish when baked.

8. Cover the baking dish with aluminum foil and bake in the preheated oven for 20 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the cheese is melted and bubbly.

9. Once the casserole is done baking, garnish with freshly chopped parsley for a pop of color and fresh flavor.