Spinach Mushroom & Potato Purée Casserole
This comforting casserole combines creamy mashed potatoes with sautéed mushrooms spinach and a golden cheesy topping. It is perfect as a vegetarian main dish or a side for a hearty meal. The earthy mushrooms and fresh spinach add depth to the smooth potato purée making it a delicious and nutritious dish for any occasion.
Prep & Cook Time
Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 55 minutes
Servings: 6
Ingredients
For the Potato Purée:
4 large potatoes (Yukon Gold or Russet) peeled and cubed
2 tbsp olive oil
½ cup milk (or plant-based milk)
½ tsp salt
¼ tsp black pepper
¼ cup grated Parmesan (optional)
For the Spinach & Mushroom Mixture:
2 tbsp olive oil
1 small onion diced
3 cloves garlic minced
8 oz mushrooms (button cremini or portobello) sliced
4 cups fresh spinach (or 10 oz frozen thawed and drained)
½ tsp salt
¼ tsp black pepper
½ tsp dried thyme (or Italian seasoning)
For the Casserole Assembly:
½ cup shredded cheese (cheddar mozzarella or Gruyère)
¼ cup breadcrumbs (optional for a crispy topping)
Instructions
Cook the Potatoes
Boil the potatoes in salted water until fork-tender (about 15 minutes)
Drain and mash with oil milk salt and pepper until smooth Stir in Parmesan if using
Sauté the Vegetables
Heat olive oil in a large skillet over medium heat
Add onions and cook until soft about 3 minutes
Stir in garlic and mushrooms cooking until mushrooms release their moisture and start browning (5-7 minutes)
Add spinach salt pepper and thyme Cook until spinach wilts Remove from heat
Assemble the Casserole
Preheat oven to 375°F (190°C)
Spread half of the mashed potatoes in a greased baking dish
Layer the spinach and mushroom mixture over the potatoes
Top with the remaining potatoes spreading evenly
Sprinkle shredded cheese and breadcrumbs on top
Bake
Bake uncovered for 20-25 minutes or until golden brown and bubbly
Let it rest for 5 minutes before serving
Tips & Variations
Dairy-Free Option: Use plant-based milk and vegan cheese
Make Ahead: Assemble the casserole a day before and refrigerate Bake when ready
Extra Creamy Texture: Add a bit of sour cream or cream cheese to the mashed potatoes
Protein Boost: Mix in cooked lentils or chickpeas for added protein
Nutrition (Per Serving)
Calories: ~250
Carbohydrates: 35g
Protein: 7g
Fat: 9g
Fiber: 4g
Vitamin A: 30% DV
Iron: 15% DV
Conclusion
This Spinach Mushroom & Potato Purée Casserole is a comforting and flavorful dish perfect for any occasion. The creamy potato purée creates a smooth and rich base while the sautéed mushrooms and spinach add depth and earthy flavors. Baked to golden perfection this casserole makes an excellent side dish or a satisfying vegetarian main course.
For best results let the casserole rest for a few minutes before serving to allow the flavors to meld. Enjoy it as is or pair it with a fresh salad or crusty bread for a complete meal. This dish is sure to become a family favorite!