Combine & Bake:
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Transfer roasted onions to a baking dish and pour the Parmesan cream sauce over them.
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Sprinkle with extra Parmesan and breadcrumbs (if using) for a crispy topping.
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Bake at 375°F (190°C) for 15-20 minutes until bubbly and golden.
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Serve:
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Garnish with fresh parsley or thyme and serve warm.
Perfect with roasted meats, holiday feasts, or as a decadent side for any cozy dinner! Enjoy!
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