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Stuffed Portobello Mushroom and Wild Rice Casserole

Stuffed Portobello Mushroom and Wild Rice Casserole
60min Total Time
6 people Servings
Medium Difficulty
Moderate Cost
350 kcal Calories

Indulge in the earthy flavors of stuffed Portobello mushrooms combined with hearty wild rice in this mouthwatering casserole that’s perfect for any occasion!


Ingredients

6
  • 6 large Portobello mushrooms, stems removed and cleaned
  • 1 cup wild rice, rinsed
  • 2 cups vegetable broth
  • 1 cup chopped onions
  • 2 cloves garlic, minced
  • 1 cup diced bell peppers (red and yellow)
  • 1 cup chopped spinach
  • 1 cup shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 1 tsp dried thyme
  • 1 tsp smoked paprika
  • Salt and pepper to taste
  • 2 tbsp olive oil

Instructions

1

Preheat the oven to 375°F (190°C).

2

In a saucepan, combine the wild rice and vegetable broth, bring to a boil, then reduce heat, cover, and simmer for 40-45 minutes until cooked.

3

While the rice is cooking, heat the olive oil in a skillet over medium heat. Add onions and garlic, sauté until translucent.

4

Stir in the diced bell peppers and spinach, cooking until the spinach wilts.

5

Combine the sautéed vegetables with the cooked wild rice, and mix in mozzarella, Parmesan, thyme, smoked paprika, salt, and pepper.

6

Place the Portobello mushrooms on a baking sheet, cavity side up. Fill each mushroom cap with the rice mixture.

7

Cover the baking sheet with foil and bake for 25 minutes

8

Remove the foil and bake for an additional 15 minutes until the cheese is bubbly and golden.

9

Let cool slightly before serving.

Kitchen Tools

  • Large pot for cooking rice
  • Skillet for sautéing
  • Baking sheet
  • Mixing bowl
  • Foil

Chef's Tips

Make sure to clean the mushrooms gently to avoid breaking them.
Add your favorite herbs to the rice mixture for extra flavor.
For a spicier kick, consider adding red pepper flakes.

Troubleshooting

If the mushrooms release too much water, pre-bake for 10 minutes before stuffing.
If the filling is too dry, add a splash of vegetable broth while mixing.

Recipe Variations

Swap the wild rice for brown rice or couscous.
Add cooked ground meat for a non-vegetarian option.
Use different cheese like feta or goat cheese for distinct flavor.

Healthy Alternatives

Use quinoa instead of wild rice for a gluten-free option.
Replace dairy cheese with a vegan cheese alternative.
Add extra veggies like zucchini or kale for added nutrition.

Serving Suggestions

Serve with a fresh green salad drizzled with balsamic vinaigrette.
Pair with roasted vegetables for a complete meal.
A slice of crusty whole grain bread complements well.

Nutrition Facts

350
Calories
15g
Protein
45g
Carbs
12g
Fat
5g
Fiber
3g
Sugar
450mg
Sodium
25mg
Cholesterol

Dietary Info

Vegetarian
Gluten-free

Garnish Ideas

Garnish with chopped fresh parsley or basil for color.
A drizzle of balsamic glaze adds flavor and presentation.

Storage

Store leftovers in an airtight container in the fridge for up to 3 days.
Reheat in the oven for the best texture, rather than the microwave.

Leftover Ideas

Mix leftover casserole into omelets for a hearty breakfast.
Create a wild rice salad by adding more fresh vegetables.
Stuff into tortillas for wraps or quesadillas.

Common Mistakes to Avoid

Overcooking the wild rice can lead to a mushy consistency.
Not using enough seasoning can make the dish bland.
Forgetting to pre-bake the mushrooms, causing excess moisture.

Frequently Asked Questions

Can I make this casserole ahead of time?

Yes, you can prepare it up to the baking step and refrigerate it overnight, then bake when ready.

What other ingredients can I add?

You can add nuts, seeds, or additional vegetables like zucchini for extra texture and flavor.

Can I freeze this casserole?

Yes, freeze it before baking for up to 3 months. Thaw and bake as directed.

Is this dish suitable for meal prep?

Absolutely! It's perfect for meal prep, offering a nutritious option for the week.

How do I know when the mushrooms are done?

The mushrooms should be tender and the cheese melted and slightly golden.

Reviews

Emma
Mar 29, 2026
Absolutely delicious! This is now one of my go-to recipes!
Oliver
Mar 29, 2026
Really good flavors, but I added more spices next time.
Sophia
Apr 7, 2026
It was decent, but felt like it needed more seasoning.
Liam
Apr 3, 2026
So hearty, loved it with a salad on the side!
Mia
Apr 3, 2026
A vegetarian delight! Everyone in my family loved it.
Noah
Apr 13, 2026
Quick and easy to make, would recommend it!
Ava
Apr 10, 2026
Delicious! I added some crushed red pepper for heat.
Isabella
Mar 20, 2026
So flavorful! Best dish I've made in a while.
Lucas
Mar 19, 2026
It was good but not as filling as I expected.
Charlotte
Apr 6, 2026
Perfect for dinner parties! Got rave reviews.
Ethan
Mar 26, 2026
Very satisfying meal! I would make it again.
Lily
Apr 12, 2026
This recipe is a keeper! I want to share it with everyone.
James
Apr 4, 2026
Tasty! I think I will add nuts for extra crunch next time.
Amelia
Apr 7, 2026
So good! I'll definitely make this again and again.
Aiden
Mar 26, 2026
Wasn't bad, but I felt it could use more veggies.
Ella
Mar 18, 2026
Loved the combination of flavors! Perfectly cheesy.
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