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 Veggie Filled Portobello Mushrooms?

You need 14 ingredients. The key ingredients include: 1 small yellow sweet pepper, cut in bite-size pieces (or red, orange, green pepper), 1 small red onion, chopped, 1 medium zucchini, coarsely shredded (or yellow squash), 1 carrot, coarsely shredded, and more.

Is Veggie Filled Portobello Mushrooms suitable as vegetarian?

Yes, Veggie Filled Portobello Mushrooms falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Veggie Filled Portobello Mushrooms?

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

Veggie Filled Portobello Mushrooms Recipe

Name: Veggie Filled Portobello Mushrooms
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 small yellow sweet pepper, cut in bite-size pieces (or red, orange, green pepper); 1 small red onion, chopped; 1 medium zucchini, coarsely shredded (or yellow squash); 1 carrot, coarsely shredded; 1 stalk celery, thinly sliced; 2 garlic cloves, minced; 1 -3 tablespoon olive oil; 1 tablespoon fresh basil, snipped; 1 tablespoon lemon juice; 1 (5 ounce) packagefresh Baby Spinach; ½ cup fine dry breadcrumb; ½ cup finely shredded parmesan cheese; 4 potobello mushroom caps, stems removed (4-5-inch); 4 slices provolone cheese

Try this homemade Veggie Filled Portobello Mushrooms recipe the whole family will love. Made with yellow sweet pepper, red onion, zucchini and carrot. E…

This Veggie Filled Portobello Mushrooms relies on simple, everyday ingredients such as small red onion, chopped, carrot, coarsely shredded, stalk celery, thinly sliced and garlic cloves, minced. It comes together quickly and makes 4 servings, at about 528 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 Vegetarian

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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Veggie Filled Portobello Mushrooms

Tips for the best results

Variations & substitutions

My Personal Notes

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