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Quick and Simple Mushroom Side Dish with Onion

This Mushroom Side Dish is a surefire way to elevate any meal. Sautéed mushrooms make the perfect side dish that comes together in 15 minutes and only requires 4 ingredients.

Close up of sautéed mushrooms in a dish.

I come from a family that absolutely loves mushrooms. We eat them as a side, we top our burgers with mushrooms, and we definitely don’t shy away from adding them onto pizzas. But if you’re someone who doesn’t fancy mushrooms, give this gluten free recipe a try. It might just pull you onto the other side.

I make this Simple Mushroom Dish because:

  • Making a plant-based side is so easy. Sometimes, making an entree can take too much time. Having to add a side dish or two with it can be overwhelming. This is my go-to side dish because I can whip it up while I’m making my main dish.
  • I usually have all the ingredients at home. Maybe it’s the mushrooms I grab while running errands. But everything else: extra virgin olive oil, salt, and onions? I usually have that at home.
  • This simple recipe is delicious. For a recipe that comes together in 15 minutes with only 4 ingredients, it sure does taste amazing.
  • Mushrooms make an easy side dish that’s healthy! Mushrooms work wonders for our immune system. A tasty dish that gives our bodies some needed antioxidants? That’s a quick and easy recipe for knocking out two birds with one stone.

Try making this the next time you’re in a rut for a side dish! Or make this simple mushroom dish to elevate your homemade burgers!

Key Ingredients

Mushroom side dish ingredients- mushrooms, salt, olive oil, and onion.

Mushrooms are rich in vitamin D, supporting your immune system and bone health.

Add in your sliced mushrooms, and stir occasionally sauté the mushrooms.

Onion is filled with quercetin, an antioxidant which lowers inflammation.

Along with those ingredients, you will need salt and extra virgin olive oil.

Find the full printable recipe with specific measurements below.

How to make this Mushroom Side Dish with Onion

Step 1: Prep the mushrooms and onion

Wash mushrooms gently and quickly and slice them. Slice the onion as thin as possible.

Chopped mushrooms and onions on a cutting board.

Step 2: Sauté the mushrooms

Into a pan add extra virgin olive oil.

Adding oil to a skillet.

Add in your sliced mushrooms, and stir occasionally sauté the mushrooms.

Mushrooms in a skillet with a wooden spoon.

Step 3: Season and add onion

Salt to taste (I add about ¼ tsp.)

Adding salt to a skillet with sautéed mushrooms.

As soon as the mushrooms begin to brown, add in the chopped onion.

Sautéing onions and mushrooms in a skillet with a wooden spoon

Step 4: Sauté until cooked

Stir and sauté for another 5 minutes.

Mushrooms sautéed in a skillet.

Expert Tips:

  • This mushroom and onion dish pairs well with various mains—try it alongside grilled chicken, pasta, ribeye steaks, or as a topping for toast.
  • Cook mushrooms in batches if needed. Overcrowding can lead to steaming instead of sautéing, affecting the texture, even in a large pan.
  • Opt for fresh mushrooms. If available, mix different mushroom varieties for a more complex flavor. Shiitake mushrooms combine well with cremini mushrooms in this dish.
  • Home cooks know: fresh herbs elevate a recipe! Feel free to use your favorite herbs for improved flavor and texture.
  • Incorporate fresh garlic cloves when sautéing with the onion for a rich garlic-y taste.
  • A splash of lemon juice into the skillet at the end works wonders and enhances the flavors of this amazing and simple side dish.

Recipe FAQs:

Can I add garlic for extra flavor?

Absolutely, minced garlic can enhance the taste. Add it one minute before the mushrooms are done to prevent them from burning. Also, garnish with fresh parsley for great taste and presentation.

How do I prevent mushrooms from getting soggy?

Ensure the pan is hot before adding mushrooms. Cook them in a single layer to allow the excess moisture to evaporate.

What mushrooms work best for this dish?

Common choices include button mushrooms, cremini, or shiitake. Experiment with a mix to discover your preferred flavor.

Can I use this as a topping for other dishes?

Absolutely! This mushroom and onion mix makes a delightful topping for grain bowls, pizzas, baked potatoes, or as a bruschetta topping.

Sautéed mushrooms with onion on a spoon ready to serve.

Here are some more tasty mushroom recipes you’ll love:

More side dish recipes

If you tried this Simple Mushroom Side Dish with Onion or any other recipe on my website, please leave a 🌟 star rating and let me know how you enjoyed it in the📝 comments below. I love hearing from you!

Mushroom side dish in a small white plate with a gold spoon.

Quick and Simple Mushroom Side Dish with Onion

Mushrooms work in our body as an antioxidant and boost our immune system. This dish is perfect as a side dish to any meal.
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Course: Dinner, Lunch, Salad, Side Dish
Cuisine: Russian
Allergy: Dairy Free, Gluten Free, Nut Free, Vegan, Vegetarian
Total Time: 25 minutes
Servings5
Calories: 103kcal
Author: Marina Rizhkov

Equipment

Ingredients

  • 1 lb mushrooms, sliced
  • 1 small onion, thinly chopped
  • salt
  • 3 Tbsp extra virgin olive oil

Instructions

  • Wash mushrooms gently and quickly and slice them. Slice the onion as thin as possible.
    Chopped mushrooms and onions on a cutting board.
  • Into a pan add extra virgin olive oil. Add in your sliced mushrooms, and stir occasionally sauté the mushrooms.
    3 Tbsp extra virgin olive oil, 1 lb mushrooms,
    Adding oil to a skillet.
  • Salt to taste (I add about ¼ tsp.) As soon as the mushrooms begin to brown, add in the chopped onion.
    salt, 1 small onion,
    Sautéing onions and mushrooms in a skillet with a wooden spoon
  • Stir and sauté for another 5 minutes.
    Mushrooms sautéed in a skillet.

Notes

Prep the ingredients for this side dish ahead of time, then quickly sauté just before you serve!

Nutrition

Calories: 103kcal | Carbohydrates: 5g | Protein: 3g | Fat: 9g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Sodium: 6mg | Potassium: 321mg | Fiber: 1g | Sugar: 3g | Vitamin A: 1IU | Vitamin C: 4mg | Calcium: 8mg | Iron: 1mg
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