This delightful dish of grilled mushrooms and onions is perfect for a quick and flavorful side. The combination of mushrooms and onions creates a savory and slightly sweet taste that pairs wonderfully with a variety of main courses. With just a few simple ingredients, you can elevate your meal with minimal effort.
If you don't usually have mushrooms or olive oil at home, you might need to pick them up at the supermarket. Mushrooms are typically found in the produce section, and you can choose from a variety of types, though common white or cremini mushrooms work well. Olive oil is usually located in the cooking oils aisle.

Ingredients for Grilled Mushrooms and Onions
Mushrooms: These add a rich, earthy flavor and meaty texture to the dish.
Onions: Provide a sweet and slightly tangy taste that complements the mushrooms.
Olive oil: Helps to coat the vegetables, ensuring they grill evenly and don't stick to the grill.
Salt: Enhances the natural flavors of the mushrooms and onions.
Black pepper: Adds a subtle heat and depth of flavor to the dish.
Technique Tip for This Recipe
To enhance the flavor of your mushrooms and onions, consider marinating them for at least 30 minutes before grilling. Use a mixture of olive oil, balsamic vinegar, garlic, and fresh herbs like thyme or rosemary. This will add depth and complexity to the dish, making it even more delicious.
Suggested Side Dishes
Alternative Ingredients
sliced mushrooms - Substitute with zucchini slices: Zucchini has a similar texture and can absorb flavors well, making it a good alternative for mushrooms.
sliced mushrooms - Substitute with eggplant slices: Eggplant provides a meaty texture similar to mushrooms and grills well.
sliced onions - Substitute with shallots: Shallots offer a milder and slightly sweeter flavor compared to onions, making them a good substitute.
sliced onions - Substitute with leeks: Leeks have a subtle onion flavor and can add a unique twist to the dish.
olive oil - Substitute with avocado oil: Avocado oil has a high smoke point and a neutral flavor, making it a suitable replacement for olive oil.
olive oil - Substitute with grapeseed oil: Grapeseed oil is light and has a high smoke point, making it a good alternative for grilling.
salt - Substitute with soy sauce: Soy sauce can add a salty and umami flavor, enhancing the overall taste of the dish.
salt - Substitute with sea salt: Sea salt can provide a different texture and a slightly different flavor profile compared to regular salt.
black pepper - Substitute with white pepper: White pepper has a milder flavor and can be used as a direct substitute for black pepper.
black pepper - Substitute with cayenne pepper: Cayenne pepper adds a bit of heat and can bring a different dimension to the dish.
Other Alternative Recipes Similar to This Dish
How To Store / Freeze This Recipe
- Allow the grilled mushrooms and onions to cool completely before storing. This helps prevent condensation, which can make them soggy.
- Transfer the cooled vegetables to an airtight container or a resealable plastic bag. Ensure you remove as much air as possible to maintain freshness.
- Store the container in the refrigerator. The grilled mushrooms and onions will stay fresh for up to 3-4 days.
- For longer storage, consider freezing. Spread the cooled vegetables in a single layer on a baking sheet lined with parchment paper. This prevents them from sticking together.
- Place the baking sheet in the freezer for about 1-2 hours, or until the vegetables are frozen solid.
- Once frozen, transfer the grilled mushrooms and onions to a resealable freezer bag or an airtight container. Label with the date for easy tracking.
- When ready to use, thaw the vegetables in the refrigerator overnight. Reheat them in a skillet over medium heat or in the microwave until warmed through.
- For best results, avoid refreezing the vegetables after they have been thawed, as this can affect their texture and flavor.
How To Reheat Leftovers
Oven Method: Preheat your oven to 350°F (175°C). Spread the grilled mushrooms and onions on a baking sheet. Cover with aluminum foil to prevent them from drying out. Heat for about 10-15 minutes or until warmed through.
Stovetop Method: Heat a skillet over medium heat. Add a small amount of olive oil or butter. Toss in the leftover mushrooms and onions. Stir occasionally until they are heated evenly, about 5-7 minutes.
Microwave Method: Place the grilled mushrooms and onions in a microwave-safe dish. Cover with a microwave-safe lid or plastic wrap, leaving a small vent for steam to escape. Microwave on medium power for 1-2 minutes, stirring halfway through, until heated thoroughly.
Air Fryer Method: Preheat your air fryer to 350°F (175°C). Place the leftover mushrooms and onions in the air fryer basket. Heat for about 5-7 minutes, shaking the basket halfway through to ensure even heating.
Sous Vide Method: Place the grilled mushrooms and onions in a vacuum-sealed bag or a ziplock bag using the water displacement method. Set your sous vide machine to 140°F (60°C) and immerse the bag in the water bath. Heat for about 30 minutes or until warmed through.
Best Tools for This Dish
Grill: Used to cook the mushrooms and onions, providing a smoky flavor and char.
Large bowl: Used to toss the mushrooms and onions with olive oil, salt, and pepper.
Tongs: Essential for turning the mushrooms and onions on the grill to ensure even cooking.
Measuring spoons: Used to measure the olive oil, salt, and black pepper accurately.
Knife: Needed to slice the mushrooms and onions.
Cutting board: Provides a safe surface for slicing the mushrooms and onions.
Serving platter: Used to serve the grilled mushrooms and onions immediately after cooking.
How to Save Time on Making This Recipe
Pre-slice ingredients: Buy pre-sliced mushrooms and onions to save prep time.
Use a grill basket: Place mushrooms and onions in a grill basket for easy turning and even cooking.
Marinate ahead: Toss mushrooms and onions with olive oil, salt, and pepper the night before to enhance flavor and save time.
Batch cooking: Grill extra mushrooms and onions to use in other meals throughout the week.

Grilled Mushrooms and Onions Recipe
Ingredients
Main Ingredients
- 500 g Mushrooms sliced
- 2 Onions sliced
- 2 tablespoon Olive oil
- 1 teaspoon Salt
- 1 teaspoon Black pepper
Instructions
- 1. Preheat your grill to medium-high heat.
- 2. In a large bowl, toss the mushrooms and onions with olive oil, salt, and pepper.
- 3. Place the mushrooms and onions on the grill. Cook for about 10-15 minutes, turning occasionally, until they are tender and slightly charred.
- 4. Remove from the grill and serve immediately.
Nutritional Value
Keywords
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