Baked Onions with Asiago Cheese

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Golden, bubbling, and irresistibly aromatic, Baked Onions with Asiago Cheese take a humble vegetable and turn it into a savory showstopper. Each thick onion slice transforms in the oven, becoming tender and slightly sweet, with edges that caramelize beautifully. Topped with rich Asiago cheese and herbs, the result is creamy, nutty, and utterly satisfying.

Perfect as a side dish, appetizer, or even a meatless main, this dish offers layers of comfort and elegance. The rich, cheesy topping contrasts wonderfully with the sweet-savory onions, making it a hit for both casual weeknight meals and special gatherings. Once you try it, you’ll never look at onions the same way again.

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Why You’ll Love This Baked Onions with Asiago Cheese

If you’re a fan of creamy, comforting dishes that also deliver depth of flavor, this one hits every mark. The slow roasting draws out the natural sugars in the onions, giving them a mellow sweetness, while the Asiago cheese adds sharp, salty complexity. It’s simple, rustic, and indulgently delicious.

Plus, it only takes a few basic ingredients to make something truly unique. Whether you’re serving it as part of a holiday spread or sneaking leftovers for breakfast (yes, it’s that good), this dish proves that the simplest ingredients often bring the most joy.

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Preparation Phase & Tools to Use

Essential Tools and Equipment:

• Cast Iron Skillet or Oven-Safe Baking Dish: Ensures even roasting and helps develop that beautiful golden crust around the onions.
• Sharp Knife: Crucial for cutting clean, uniform onion slices for even cooking.
• Cutting Board: A sturdy surface to prep the onions with stability.
• Small Mixing Bowl: For mixing the cheese, seasoning, and any herbs or butter that will go over the onions.
• Tongs or Spatula: Helpful for placing the onions carefully into the dish without breaking them apart.

Why These Tools Matter:

Each tool plays a role in maximizing the flavor and appearance of the final dish. The skillet allows for high-heat browning, the sharp knife prevents tearing or smashing the onion layers, and a well-blended topping ensures that each slice gets the same delicious attention.

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Ingredients for the Baked Onions with Asiago Cheese

• Yellow Onions: The star of the show. Their natural sweetness intensifies during roasting, providing a soft, melt-in-your-mouth base.
• Asiago Cheese: Offers a rich, nutty flavor that melts beautifully and forms a golden, bubbly crust.
• Butter: Adds creaminess and helps with browning. It also enhances the onion’s flavor.
• Garlic Powder: Adds a subtle kick and savory aroma.
• Fresh Parsley: Brings freshness and color to the finished dish.
• Salt and Black Pepper: Essential for seasoning and balancing flavors.

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How To Make the Baked Onions with Asiago Cheese

Step 1: Preheat and Prepare

Preheat your oven to 375°F (190°C). Grease a baking dish or cast iron skillet with a little butter to prevent sticking and promote browning.

Step 2: Slice the Onions

Peel the onions and slice them into thick rounds, about 3/4 inch to 1 inch thick. Keep the rings intact for presentation.

Step 3: Season Generously

Place the onion slices in the baking dish. Sprinkle each with garlic powder, salt, and black pepper. Add a small pat of butter on top of each slice.

Step 4: Roast Until Tender

Bake uncovered for about 25-30 minutes, until the onions are tender and just beginning to brown at the edges.

Step 5: Add Cheese and Finish

Sprinkle shredded Asiago cheese generously over each onion slice. Return to the oven and broil for 2-4 minutes, until the cheese is melted and golden brown.

Step 6: Garnish and Serve

Sprinkle fresh parsley on top right before serving for a pop of color and herbal brightness.

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How to Serve and Store Baked Onions with Asiago Cheese

These onions are best served hot, straight from the oven, when the cheese is at peak gooeyness. Pair them with grilled meats, hearty grains, or serve as an impressive vegetarian main.

For storing, allow leftovers to cool completely. Transfer to an airtight container and refrigerate for up to 4 days. Reheat in the oven or air fryer to regain their crispy-cheesy top.

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Frequently Asked Questions

How thick should I slice the onions?

Aim for about 3/4 to 1 inch thick. This ensures the onions cook evenly while holding their shape.

Can I substitute the cheese?

Yes! Parmesan, Gruyère, or even Fontina can be used if you can’t find Asiago.

Do I need to parboil the onions first?

No need! Baking them low and slow makes them perfectly tender.

Can I prep this in advance?

You can slice and season the onions ahead of time, but add the cheese just before baking for best texture.

Is this dish freezer-friendly?

It’s not ideal. The texture of the onions and cheese is best enjoyed fresh or refrigerated for a few days.

Can I use red onions?

You can, but they have a sharper taste and won’t caramelize as sweetly as yellow onions.

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Want More Cheesy Veggie Ideas?

If you’re loving this Baked Onions with Asiago Cheese recipe, here are more cozy, flavor-packed options to explore:

• Try our creamy and indulgent Golden Crispy Chicken with Parmesan Mushroom Sauce for a full meal pairing.
• Love oven-roasted sides? You’ll enjoy these Roasted Parmesan Green Beans.
• For a creamy one-dish wonder, the Cheesesteak Tortellini Bliss is comfort food heaven.
• Need more onion-forward meals? Check out the French Onion Ground Beef and Rice Casserole.

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Save This Pin For Later

📌 Save this recipe to your Pinterest side dish board so you can come back to it whenever you need a delicious and comforting veggie dish.

And let me know in the comments how yours turned out. Did you stick with Asiago or get creative with other cheeses? Did you serve it solo or alongside your favorite entree?

I love hearing your twists and takes. Your kitchen is where the magic really happens.

For more daily comfort recipes, follow me on Pinterest at Kitchen By Kate.

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