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

Chef's Tips & Variations

  • Don't Rush the Onions: Low and slow is the key to caramelization. Rushing them over high heat will just fry them and make them bitter.

  • No-Stovetop Shortcut: If you want to skip the stovetop step, you can toss the raw sliced onions with 1 tbsp of oil, spread them on a baking sheet, and roast at 400°F (200°C) for 25-30 minutes, stirring once, until they soften and brown at the edges. Then proceed with the recipe.

  • Cheese Substitutes: If you can't find Gruyère, a good Swiss, Emmental, or even a combination of Mozzarella (for meltiness) and Parmesan (for flavor) will work well.

  • Broth Options: For a vegetarian version, use a rich vegetable broth. You can also use chicken broth.

  • Elevate the Breadcrumbs: For extra flavor, use panko breadcrumbs or mix regular breadcrumbs with a tablespoon of melted butter or olive oil before combining with the cheese.

  • Add-Ins: Feel free to add a clove or two of minced garlic to the onions in the last minute of sautéing.


Nutritional Information (Per Serving, Estimated)

  • Calories: ~420

  • Total Fat: 22g

  • Saturated Fat: 12g

  • Cholesterol: 65mg

  • Sodium: ~750mg

  • Total Carbohydrates: 35g

  • Dietary Fiber: 4g

  • Sugars: 10g

  • Protein: 22g

Enjoy this deliciously simple and comforting bake!

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