Baked Onions with Asiago Cheese

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If you’re craving something deeply savory, delightfully melty, and surprisingly simple to make, these Baked Onions with Asiago Cheese are the perfect comfort side dish. Imagine tender, caramelized onion layers bubbling under a blanket of golden, nutty Asiago. It’s rustic, aromatic, and irresistibly cheesy – the kind of dish that makes you want to scoop up every last bite.

The natural sweetness of baked onions pairs beautifully with the sharp, slightly salty richness of Asiago cheese. Each forkful delivers soft, buttery onion with crispy, cheesy edges. It’s a fantastic side for steak night, roast chicken, or even as a vegetarian centerpiece with crusty bread.

Why You’ll Love This Baked Onions with Asiago Cheese Recipe

This recipe is uncomplicated but full of flavor. The oven does most of the work, drawing out the onion’s sweetness and giving the cheese a perfectly browned finish. You don’t need fancy equipment or a long ingredient list either.

Whether you serve it during a holiday dinner or a casual weeknight meal, it’s guaranteed to impress. And if you’re a fan of low-effort, big-reward dishes, you’ll find yourself making this again and again.

What Kind of Onions Should I Use?

Yellow onions are ideal for this recipe because they caramelize beautifully in the oven. Their mild sweetness deepens as they bake, balancing out the sharpness of the Asiago. If you prefer a milder taste, you can opt for sweet onions like Vidalia. Red onions offer a bit more bite and a pop of color, but might overpower the Asiago. Avoid white onions here – they don’t break down as smoothly and can remain a bit too pungent after baking.

Ingredients for the Baked Onions with Asiago Cheese

This dish comes together with just a few everyday ingredients, each one playing a key role in creating the ultimate flavor-packed, cheesy baked goodness. Freshness matters, so grab the best onions and cheese you can find.

• Yellow onions: The star of the show. Their natural sugars caramelize during baking, turning soft and sweet with a hint of smokiness.
• Asiago cheese: Nutty and slightly sharp, Asiago melts into a bubbly golden topping that clings beautifully to the onions.
• Olive oil: Helps roast the onions evenly and adds a subtle richness to every bite.
• Salt: Enhances the onions’ natural sweetness and balances the sharpness of the cheese.
• Black pepper: Just enough to give a gentle kick without overpowering the dish.
• Fresh thyme (optional): Adds an earthy herbal note that pairs nicely with the sweet-savory flavor combo.

How To Make the Baked Onions with Asiago Cheese

Step 1: Preheat and Prep

Preheat your oven to 400°F (200°C). Slice the onions in half from root to tip and peel off the papery outer layers. Trim the root slightly to allow them to sit flat in the baking dish.

Step 2: Arrange and Season

Place the onion halves cut side up in a baking dish. Drizzle generously with olive oil, making sure it seeps between the onion layers. Sprinkle salt, pepper, and thyme (if using) over the top.

Step 3: Roast the Onions

Cover the dish with foil and bake for 35-40 minutes until the onions are tender and slightly golden. Then, remove the foil and roast for an additional 10-15 minutes to deepen the caramelization.

Step 4: Add the Asiago

Sprinkle a generous amount of shredded Asiago cheese over each onion half. Return the dish to the oven, uncovered, and bake for another 10 minutes until the cheese is melted and bubbly with golden-brown spots.

Step 5: Serve

Let the onions cool slightly before serving so the flavors settle and the cheese holds firm. They’re best enjoyed warm, straight from the baking dish.

How to Serve and Store Baked Onions with Asiago Cheese

These cheesy baked onions are a versatile dish that fits perfectly into any meal plan. Serve them fresh from the oven as a warm and hearty side dish, or make them ahead and reheat when needed. This recipe feeds about 4 people as a generous side.

To store leftovers, let the onions cool completely before transferring them to an airtight container. They will keep well in the refrigerator for up to 4 days. Reheat in the oven at 350°F until warmed through, allowing the cheese to re-melt and the onions to regain their tenderness. Avoid microwaving if you want to preserve the delicious crispy cheese top.

What to Serve With Baked Onions with Asiago Cheese?

Grilled Ribeye Steak

The deep caramelization of the onions pairs wonderfully with the bold flavors of a juicy ribeye. It adds richness without stealing the spotlight.

Garlic Herb Roasted Chicken

Baked onions complement roasted poultry beautifully, especially when the chicken is seasoned with herbs like rosemary or sage.

Creamy Mashed Potatoes

Soft onions and creamy mashed potatoes are a dream combination. The cheesy top of the onions adds texture to this classic side.

Crusty Sourdough Bread

A thick slice of crusty bread is all you need to turn this dish into a vegetarian meal. Scoop up the cheesy onions like you would a dip.

Sautéed Green Beans

Add something crisp and green to balance the richness. Green beans with a little garlic and lemon zest work perfectly.

Pork Chops

Whether pan-seared or grilled, pork chops find a cozy companion in these sweet-savory onions.

Lentil Stew

For a meatless option, a hearty lentil stew brings out the comfort-food side of the onions. Earthy, warm, and filling.

Caesar Salad

A crisp Caesar with its bold dressing and crunchy croutons offers a refreshing contrast to the soft, cheesy onions.

Want More Cheesy Side Dish Ideas?

If these Baked Onions with Asiago Cheese made your taste buds dance, you might want to try more savory, comforting dishes like these:

• Cheesy Baked Tortellini with Meat Sauce for a meaty, melty pasta bake.
• Mushroom Mozzarella Bake if you’re looking for another rich vegetarian dish.
• Cheesy Brussels Sprout Bake to bring crispy edges and creamy centers to your veggie sides.
• Loaded Scalloped Potatoes for another crowd-pleasing cheesy classic.
• Creamy Garlic Orzo with Lemon Chicken Meatballs for when you want a whole meal built around comforting flavors.

Save This Recipe For Later

📌 Save this recipe to your Pinterest dinner or side dish board so you can come back to it anytime.

And let me know in the comments how it turned out for you! Did you go heavy on the Asiago or toss in another cheese blend? Maybe you added rosemary instead of thyme?

I love hearing how you make these dishes your own. Questions are welcome too – let’s keep sharing our kitchen wins.

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