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Caramelized Onion Spaghetti Squash

Recipe By:
Sarah
Updated:

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Caramelized Onion Spaghetti Squash is a dish that beautifully merges two worlds – the comfort of pasta and the wholesome goodness of vegetables. If you’ve ever tasted the deep, rich flavor of caramelized onions, you’ll know how they can elevate a dish from ordinary to extraordinary. When paired with spaghetti squash, you not only get a hearty meal but also a delightful, health-conscious option. This recipe embraces simplicity while packing a punch of flavor, making it a perfect choice for weeknight dinners or gatherings with friends. Plus, it’s a great way to showcase the versatility of spaghetti squash, transforming this often-overlooked veggie into the star of your dinner table. Let’s roll up our sleeves and get cooking!

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Why This Recipe Works

Caramelizing onions draws out their natural sweetness, creating a delicious contrast to the nuttiness of spaghetti squash. Instead of relying on heavy sauces or complicated ingredients, this recipe shines by combining simple components in a way that uplifts this humble vegetable. As the onions turn a beautiful golden brown, they release an enticing aroma that fills your kitchen with warmth. When everything comes together—the sweetness of the onions, the rich texture of the mushrooms, and the vibrant notes from the kale—you’ll discover how these elements make this dish much more than just a side. It’s a flavorful centerpiece that is destined to impress.

Why You’ll Love This Caramelized Onion Spaghetti Squash

This dish is not just food; it’s comfort on a plate. Imagine a cozy evening spent savoring each bite of a warm bowl filled with wholesome ingredients. It’s heartwarming and satisfying, yet nutritious. That’s right—this recipe is loaded with fiber and vitamins, making it a fantastic choice for health-conscious eaters who still want to enjoy a satisfying meal. What’s even better? It’s easily customizable! Whether you’re vegetarian, vegan, or simply looking to incorporate more veggies into your diet, this dish can adapt to fit your needs without compromising on deliciousness.

Caramelized Onion Spaghetti Squash

Ingredients

  • 1 spaghetti squash (2-3 lbs)
  • 1/4 cup olive oil
  • 2 tbsp butter (dairy-free if preferred)
  • 2 medium yellow onions, peeled and sliced
  • 1½ cups mushrooms, sliced
  • 1 cup kale, chopped
  • 1/4 tsp fresh rosemary (or dried)
  • Salt and pepper, to taste
  • Optional: sprinkle of parmesan cheese

How to Prepare Caramelized Onion Spaghetti Squash

Caramelized Onion Spaghetti Squash

Preheat the Oven and Prepare the Squash

Start by preheating your oven to 350°F (175°C). When the oven is hot, carefully slice the spaghetti squash in half lengthwise. Take a moment to scoop out the seeds; this step is crucial as it prepares the squash for roasting. Once done, place the halves cut-side down on a baking sheet.

Brush with Olive Oil

Next, take 1 tablespoon of olive oil and drizzle it over the cut side of each half of the squash. Make sure to spread it around evenly—this will help the squash get that beautiful golden hue when it roasts.

Roast the Squash

Now, slip the baking sheet into your preheated oven. Let the squash roast for about 45 minutes. You’ll know it’s ready when the flesh is tender, and it easily gives way to a fork.

Cook the Onions

While the squash is roasting, grab a large skillet and melt the butter. Add the remaining 2 tablespoons of olive oil over medium-high heat. Toss in the sliced onions, stirring occasionally. The goal here is to coax out their sweetness, so don’t rush this step.

Add the Mushrooms

After about 5 minutes, it’s time to invite the sliced mushrooms into the skillet. Let them cook alongside the onions for 10-15 minutes, stirring occasionally. You’re aiming for that beautiful caramel color. If things start to look a little too brown, just add an extra tablespoon of oil to help things along.

Stir in the Kale and Herbs

Once the onions and mushrooms are beautifully caramelized, it’s time for the kale to join the party. Sprinkle in the chopped kale and keep stirring, letting everything meld together. As you cook, the onions will become a luscious golden brown, creating a delightful mix of flavors.

Scrape the Spaghetti from the Squash

By now, your squash should be ready. Carefully remove it from the oven, allowing it to cool for about 10 minutes. Using a fork, gently scrape out the spaghetti-like strands and transfer them to your skillet with the onion mixture.

Season and Serve

Add the fresh rosemary into the mix, and don’t forget salt and pepper to taste. For an extra touch of flavor, you can sprinkle parmesan cheese on top before serving.

Serving Suggestions

This Caramelized Onion Spaghetti Squash pairs beautifully with grilled chicken or a light side salad. If you want to keep it simple, enjoy it as a standalone dish. A slice of crusty bread on the side is always a nice touch, too.

Tips for Success

  • Ensure you slice the onions uniformly for even cooking.
  • Keep an eye on the caramelization process; stirring regularly prevents burning.
  • In a pinch? Use pre-chopped vegetables to save time without sacrificing flavor.

Variations

Looking to mix things up? Swap the mushrooms with other veggies like bell peppers or zucchini for a different texture. You can also try out different herbs, such as thyme or sage, to bring new flavors to your dish.

Storage Tips

Leftover Caramelized Onion Spaghetti Squash can be stored in an airtight container in the refrigerator for up to 3 days. When you’re ready to enjoy it again, simply reheat it on the stove or in the microwave.

Pairing Ideas

This dish pairs wonderfully with a chilled glass of Sauvignon Blanc, or you could opt for a refreshing lemon-infused sparkling water to enhance the meal’s bright flavors.

Caramelized Onion Spaghetti Squash

FAQs

1. Can I make this dish vegan?
Absolutely! Just swap the butter for plant-based butter, and feel free to skip the parmesan cheese.

2. How can I tell when the spaghetti squash is done?
The flesh should be fork-tender and easily shred into strands, which is the perfect “spaghetti” texture.

3. Can I use pre-cooked onions for this recipe?
Yes, if you have pre-cooked or frozen caramelized onions, simply add them directly to the dish to save time.

4. Is it possible to bake the spaghetti squash with toppings?
Indeed, you can add toppings before the last 15 minutes of baking. This will allow the flavors to meld together beautifully.

5. How should I store leftovers?
Place leftovers in an airtight container in the fridge, and try to consume them within 3 days for the best quality.

This Caramelized Onion Spaghetti Squash is a delightful experience for your taste buds, combining sweetness with earthy flavors in a nourishing meal that’s simple to prepare. Perfect for cozy dinners or impressing guests, it proves that healthy can indeed be delicious! Enjoy every bite as you explore this comforting dish that’s become a favorite for many cooking enthusiasts.

Print
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Caramelized Onion Spaghetti Squash

Caramelized Onion Spaghetti Squash

This dish combines the comfort of pasta and wholesome veggies, featuring caramelized onions, mushrooms, and kale for a nutritious and flavorful meal.

  • Total Time: 1 hour 15 minutes
  • Yield: 4 servings 1x

Ingredients

Scale
  • 1 spaghetti squash (23 lbs)
  • 1/4 cup olive oil
  • 2 tbsp butter (dairy-free if preferred)
  • 2 medium yellow onions, peeled and sliced
  • 1½ cups mushrooms, sliced
  • 1 cup kale, chopped
  • 1/4 tsp fresh rosemary (or dried)
  • Salt and pepper, to taste
  • Optional: sprinkle of parmesan cheese

Instructions

  • Preheat the oven to 350°F (175°C) and slice the squash in half.
  • Scoop out seeds and place cut-side down on a baking sheet.
  • Drizzle olive oil over the cut side of the squash.
  • Roast the squash for about 45 minutes until tender.
  • In a skillet, melt butter and olive oil, then add sliced onions and cook until sweet.
  • Stir in sliced mushrooms and cook until caramelized.
  • Add chopped kale and stir, allowing flavors to meld.
  • Scrape the roasted squash strands into the skillet.
  • Season with rosemary, salt, and pepper before serving.

Notes

Slice onions uniformly for even cooking.
Stir regularly while caramelizing to prevent burning.
Use pre-chopped vegetables for a quicker prep.

  • Author: Jesseca
  • Prep Time: 15 minutes
  • Cook Time: 1 hour
  • Category: Vegetarian
  • Method: Roasting & Sautéing
  • Cuisine: American

Nutrition

  • Calories: 205
  • Sugar: 3
  • Sodium: 180
  • Fat: 12
  • Saturated Fat: 3
  • Unsaturated Fat: 9
  • Trans Fat: 0
  • Carbohydrates: 17
  • Fiber: 4
  • Protein: 4
  • Cholesterol: 10

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