Raw-sliced onions in a casserole? That’s an interesting approach! Raw onions add a mild, sweet flavor when baked in a casserole, and they can soften and caramelize beautifully in the oven. Here’s a simple recipe that uses raw-sliced onions as a key ingredient in the casserole:
Caramelized Onion and Cheese Casserole
This is a savory, rich casserole where the onions are baked alongside cheese and other delicious ingredients, allowing them to soften and meld into a flavorful dish.
Ingredients:
- 2 large onions, thinly sliced (yellow or sweet onions work best)
- 2 cups shredded cheese (cheddar, mozzarella, or a blend)
- 1 cup sour cream (or Greek yogurt for a tangy twist)
- 1/2 cup mayonnaise
- 1 cup breadcrumbs (preferably panko for a crunchier texture)
- 1/2 cup butter, melted
- 2 tablespoons olive oil
- 1 teaspoon garlic powder
- 1 teaspoon dried thyme (optional)
- 1/2 teaspoon black pepper
- 1/2 teaspoon salt (adjust to taste)
- 1 tablespoon fresh parsley, chopped (optional, for garnish)
Instructions:
- Prepare the onions: Slice the onions thinly and set aside.
- Sauté the onions (optional): If you like your onions a little more caramelized, you can sauté them first in a skillet with olive oil for 5–7 minutes until soft and slightly golden. If you prefer to keep the onions raw for a sharper bite, skip this step and use them directly in the casserole.
- Mix the base: In a large mixing bowl, combine the sour cream, mayonnaise, garlic powder, thyme (if using), salt, and pepper. Stir until smooth.
- Add the onions: Stir the raw-sliced onions into the sour cream mixture, ensuring they are evenly coated.
- Assemble the casserole: Pour the onion mixture into a greased 9×13-inch casserole dish. Spread it out evenly.
- Top with cheese and breadcrumbs: Sprinkle half of the shredded cheese over the onion mixture. In a small bowl, mix the breadcrumbs with the melted butter, then sprinkle the buttered breadcrumbs on top of the cheese layer.
- Bake: Preheat your oven to 350°F (175°C). Bake the casserole uncovered for about 30–40 minutes, or until the top is golden brown and the cheese is bubbly and melted.
- Garnish and serve: Once out of the oven, garnish with fresh chopped parsley if desired. Let it cool for a few minutes before serving.
Variations:
- Add protein: For a more filling dish, add cooked chicken, sausage, or bacon crumbles into the onion mixture before baking.
- Vegetarian version: Stick with the basic recipe or add veggies like mushrooms, spinach, or bell peppers for extra flavor.
- Add spice: A pinch of cayenne pepper or red pepper flakes can give the casserole a nice kick.
This casserole is comforting and savory, with a great balance of creamy, cheesy, and caramelized flavors. It’s perfect as a side dish or a main course with a green salad. Have you ever used raw-sliced onions in a casserole before, or is this a new concept for you?
