Mushroom Leek Kale Spaghetti Squash

5 from 1 vote

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Try this mushroom leek kale spaghetti squash for a vegan main served with a mixed greens salad or as simple side for a weeknight dinner or even a big holiday meal.

Mushroom Leek Kale Spaghetti Squash

Who knew hitting the jackpot could be finding a spaghetti squash in my CSA last week.

It’s the little things, right?

Throwing gratitude into the air even for what one person might consider insignificant doesn’t take much effort.

And I hope this kind of easy breezy positivity is contagious. That might be the only bug I want to catch these days!

Roasted Spaghetti Squash with Mushrooms and Kale

Last month I made healthy roasted tomato spinach spaghetti squash.

Ever since it’s been on my list to share another recipe with this incredibly versatile vegetable: mushroom leek kale spaghetti squash.

Mushrooms and leeks go so well together, and kale is a welcome addition.

I like including nutritious greens whenever I can. It’s not difficult because they work in lots of cold weather meals like soups and sauteed vegetable dishes.

Combing roasted spaghetti squash flesh with a fork

How To Make Mushroom Leek Kale Spaghetti Squash

First, I bake the spaghetti squash in the oven. You absolutely can do this in advance to save time.

The halved spaghetti squash takes about 40 minutes to roast. If you plan to bake it ahead of time, use a fork to comb the flesh from the skin, let it cool down and then store it in an airtight container for up to 1-2 days.

In a skillet on the stove, I heat olive oil and sauté the leeks. Once the leeks start to soften, I add sliced cremini mushrooms.

When the mushrooms have caramelized, I stir in minced garlic.

Mushroom Leek Kale Spaghetti Squash

Then I add chopped curly kale and watch the greens wilt.

After that I fold the spaghetti squash into the mushrooms and greens in the skillet.

In addition to salt and pepper for seasoning, I use nutritional yeast, a common vegan substitute for Parmesan.

Nutritional yeast melds right into the spaghetti squash adding wonderfully cheesy flavor.

To finish, I mix in chopped toasted walnuts and parsley.

Spaghetti Squash with mushrooms, kale and leeks

Try Spaghetti Squash as a Vegan Main or Side

Especially during the fall and winter months, I am on a constant hunt for nutritious comfort food.

I like serving mushroom leek kale spaghetti squash as a main with a salad. It is a different option than soup with that same warm, cozy and comforting bite.

Spaghetti squash also makes a great side, too. With mushrooms and leeks, it would fit right in with a holiday meal like Thanksgiving.

Mushroom Leek Kale Spaghetti Squash
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Mushroom Leek Kale Spaghetti Squash

5 from 1 vote
Prep: 5 minutes
Cook: 55 minutes
Total: 1 hour
Servings: 4
Try this mushroom leek kale spaghetti squash for a vegan main served with a mixed greens salad or as simple side for a weeknight dinner or even a big holiday meal.


  • 1 3-pound spaghetti squash
  • 2 tablespoons olive oil
  • 1 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • 2 leeks white and light green parts thinly sliced
  • 8 ounces cremini mushrooms sliced
  • 2 garlic cloves minced
  • 1 cup chopped curly kale stems removed
  • 2 tablespoons nutritional yeast
  • 1/4 cup toasted chopped walnuts
  • 1 tablespoon chopped parsley plus more for serving


  • Preheat the oven to 400 degrees F. Line a sheet pan with aluminum foil.
  • Slice the spaghetti squash in half lengthwise and scoop out the seeds. Rub the squash with 1 tablespoon olive oil and sprinkle the cut sides with 1/2 teaspoon salt and 1/4 teaspoon pepper.
  • Place the squash cut-side down and roast for 40 minutes until the squash can be pierced with a pairing knife.
  • When the squash is cool enough to handle, use a fork remove the flesh.
  • Heat 1 tablespoon olive oil in a large skillet over medium high heat. Sauté the leeks for a few minutes letting them start to soften. Add the mushrooms and continue sautéing for 5 minutes until the mushrooms start to brown. Stir in the garlic and kale and continue cooking for a few minutes until the mushrooms are caramelized and fragrant and the kale has wilted.
  • Stir spaghetti squash into the skillet with the nutritional yeast, walnuts, parsley and remaining salt and pepper.
  • Spoon the spaghetti squash into a serving bowl and sprinkle chopped parsley on top.


The spaghetti squash can be roasted up to 1-2 days in advance and stored in the refrigerator in an airtight container. Since it will be chilled, it will require additional time to heat in the skillet.


Calories: 247kcal | Carbohydrates: 29g | Protein: 7g | Fat: 14g | Saturated Fat: 2g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 6g | Sodium: 645mg | Potassium: 776mg | Fiber: 7g | Sugar: 10g | Vitamin A: 2792IU | Vitamin C: 28mg | Calcium: 147mg | Iron: 3mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Course: Main Dishes
Cuisine: American
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Hi, I'm Paige.

Welcome to Last Ingredient where you will find simple seasonal recipes with plenty of fruits and vegetables, all for the home cook.

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