How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Grilled Stuffed Portobello Mushrooms?

You need 10 ingredients. The key ingredients include: 2 (4 1/2-inch) portobello mushroom caps, 2 teaspoons olive oil, divided, 1 garlic clove, minced, 3/4 cup minced onion (1 small), and more.

Is Grilled Stuffed Portobello Mushrooms suitable as general?

Yes, Grilled Stuffed Portobello Mushrooms falls under the General category and is a great choice for this type of meal.

How do I store leftover Grilled Stuffed Portobello Mushrooms?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Grilled Stuffed Portobello Mushrooms Recipe

Name: Grilled Stuffed Portobello Mushrooms
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 (4 1/2-inch) portobello mushroom caps; 2 teaspoons olive oil, divided; 1 garlic clove, minced; 3/4 cup minced onion (1 small); 1 1/2 teaspoons chopped fresh oregano; 1/2 cup bagged baby spinach leaves; 1/4 cup grated Parmesan cheese; 1/3 cup Italian-seasoned panko (Japanese breadcrumbs); 1 1/2 teaspoons balsamic vinegar; 1/2 teaspoon black pepper

Try this homemade Grilled Stuffed Portobello Mushrooms recipe the whole family will love. Made with portobello mushroom caps, olive oil, garlic and onio…

This Grilled Stuffed Portobello Mushrooms relies on simple, everyday ingredients such as olive oil, divided, garlic clove, minced, minced onion (1 small) and chopped fresh oregano. It comes together quickly and makes 4 servings, at about 151 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 General

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Grilled Stuffed Portobello Mushrooms

Tips for the best results

Variations & substitutions

My Personal Notes

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