Grated Potato Pie with Spinach & Mushrooms
Grated Potato Pie with Spinach & Mushrooms is a comforting and satisfying savory pie that combines a crispy golden potato crust with a rich filling of sautéed mushrooms, fresh spinach, aromatic herbs, and melted cheeses. This rustic dish is perfect for brunch, lunch, dinner, or even as a vegetarian centerpiece for gatherings. The grated potato base becomes beautifully crisp during baking, while the cheesy vegetable filling remains soft, flavorful, and hearty. Easy to prepare and packed with wholesome ingredients, this pie is a delicious way to transform simple pantry staples into an impressive meal.
Preparation Time
25 minutes
Cooking Time
50–55 minutes
Total Time
1 hour 20 minutes
Servings
6–8 servings
Ingredients
For the Potato Crust
600g potatoes (about 4 medium), peeled and grated
80g shredded mozzarella cheese
2 large eggs
2 tablespoons olive oil
Salt, to taste
Black pepper, to taste
1 teaspoon dried oregano
2 tablespoons fresh parsley, finely chopped
For the Filling
200g champignon or button mushrooms, sliced
150g fresh baby spinach
1 small onion, diced
1–2 garlic cloves, minced
1–2 tablespoons olive oil
Salt, to taste
Black pepper, to taste
1 teaspoon dried oregano
For the Topping
100g shredded mozzarella cheese
120g mozzarella fior di latte, torn into pieces
30g grated Parmesan cheese
Fresh parsley for garnish
Instructions
Prepare the Potato Crust
Preheat the oven to 400°F (200°C).
Grease a 9-inch pie dish or baking dish.
Place the grated potatoes in a clean kitchen towel and squeeze out as much excess moisture as possible. This step is essential for achieving a crispy crust.
Transfer the potatoes to a large bowl.
Add shredded mozzarella, eggs, olive oil, oregano, parsley, salt, and black pepper.
Mix thoroughly until well combined.
Form the Crust
Press the potato mixture firmly into the prepared pie dish, covering the bottom and slightly up the sides.
Bake for 25–30 minutes until lightly golden and partially crisp.
Remove from the oven and set aside.
Prepare the Filling
While the crust bakes, heat olive oil in a large skillet over medium heat.
Add the onion and cook for 3–4 minutes until softened.
Stir in the garlic and cook for another 30 seconds.
Add the mushrooms and sauté for 6–8 minutes until browned and most of the moisture has evaporated.
Add the spinach and cook until wilted.
Season with oregano, salt, and pepper.
Remove from heat and allow the mixture to cool slightly.
Assemble the Pie
Spread the mushroom and spinach mixture evenly over the baked potato crust.
Sprinkle the shredded mozzarella over the filling.
Distribute the torn mozzarella fior di latte evenly across the surface.
Finish with grated Parmesan cheese.
Bake the Pie
Return the pie to the oven.
Bake for 20–25 minutes until the cheese is melted, bubbly, and lightly golden.
Rest Before Serving
Allow the pie to rest for 10 minutes before slicing.
Garnish with freshly chopped parsley.
Serve warm.
Tips
Remove Excess Moisture
Squeezing moisture from the grated potatoes is the key to creating a crispy crust rather than a soggy one.
Use Starchy Potatoes
Russet or other starchy potatoes provide the best texture and hold together well.
Pre-Bake the Crust
Never skip the initial baking step, as it helps the crust firm up before adding the filling.
Cook Mushrooms Thoroughly
Mushrooms release a significant amount of water. Cook them until most of the liquid evaporates.
Avoid Overloading the Filling
Too much filling can make the pie difficult to slice neatly.
Use Fresh Mozzarella Sparingly
Fresh mozzarella adds creaminess but can release moisture, so distribute it evenly rather than piling it on.
Allow the Pie to Rest
Resting helps the filling set and makes slicing easier.
Season Every Layer
Season both the crust and filling separately for maximum flavor.
Use Fresh Herbs
Fresh parsley adds brightness and complements the earthy mushrooms.
Serve Fresh
The pie is at its crispiest and most flavorful shortly after baking.
Variations
Mediterranean Version
Add crumbled feta cheese, sun-dried tomatoes, and olives to the filling.
Protein-Packed Pie
Mix cooked shredded chicken or turkey into the mushroom filling.
Three-Cheese Upgrade
Add provolone, cheddar, or Gruyère alongside the mozzarella and Parmesan.
Spinach and Ricotta Pie
Mix ricotta cheese into the spinach filling for extra creaminess.
Garden Vegetable Variation
Include zucchini, bell peppers, and roasted eggplant.
Spicy Version
Add crushed red pepper flakes or diced jalapeños.
Breakfast Potato Pie
Add cooked bacon, sausage, or ham along with the vegetables.
Gluten-Free Comfort Dish
The recipe is naturally gluten-free when all ingredients are certified gluten-free.
Herb Lover’s Pie
Increase parsley and add fresh thyme, basil, and chives.
Mushroom Medley Version
Use a mixture of cremini, shiitake, oyster, and button mushrooms for richer flavor.
Frequently Asked Questions
Can I make this pie ahead of time?
Yes. Assemble the pie in advance and refrigerate until ready to bake.
What potatoes work best?
Russet potatoes are ideal because of their starch content and crisp texture.
Can I freeze the pie?
Yes. Bake completely, cool thoroughly, and freeze for up to 2 months.
Why is my crust soggy?
Excess moisture in the potatoes or vegetables is usually the cause.
Can I use frozen spinach?
Yes. Thaw it completely and squeeze out excess water before using.
Can I replace mozzarella with another cheese?
Absolutely. Cheddar, Gruyère, Monterey Jack, or provolone work well.
How long will leftovers last?
Store in an airtight container in the refrigerator for up to 4 days.
Can I make it vegetarian?
Yes. The base recipe is already vegetarian.
What should I serve with it?
A fresh green salad, roasted vegetables, or soup pairs beautifully.
Can I reheat individual slices?
Yes. Reheat in the oven or air fryer to maintain a crispy crust.
Nutrition
Approximate per serving (based on 8 servings)
Calories: 290
Protein: 13g
Carbohydrates: 22g
Fat: 17g
Saturated Fat: 7g
Fiber: 3g
Sugar: 2g
Sodium: 340mg
Potassium: 580mg
Calcium: 20% Daily Value
Iron: 10% Daily Value
Vitamin A: 25% Daily Value
Vitamin C: 20% Daily Value
Nutrition values may vary depending on ingredient brands and serving sizes.
Conclusion
Grated Potato Pie with Spinach & Mushrooms is a delicious combination of crispy potatoes, savory vegetables, and melted cheese that delivers comfort and flavor in every bite. The golden potato crust provides the perfect foundation for the rich mushroom and spinach filling, while the blend of cheeses creates an irresistible topping. Whether served as a hearty vegetarian main course, brunch centerpiece, or family dinner, this satisfying pie is both versatile and crowd-pleasing. With its crispy texture, wholesome ingredients, and rich flavor, it’s a recipe you’ll want to make again and again.