Wild Mushroom, Spinach and Caramelized Onion Casserole

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Serve 6

Ingredients

1 large Vidalia or other sweet onion, peeled and thinly sliced

5 tbsp olive oil, divided

6 oz mixed sliced fresh wild mushrooms (shiitake, crimini, etc.)

1 large shallot, minced

½ cup dried porcini mushrooms

Sea salt

Coarse ground black pepper

1.5 cups heavy cream

1.5 cups grated Parmesan cheese

1 tsp fresh thyme or tarragon, minced (optional)

2 lbs baby spinach, fresh or frozen 

Panko crumbs

 | 
 | 
Serve 6

Ingredients

1 large Vidalia or other sweet onion, peeled and thinly sliced

5 tbsp olive oil, divided

6 oz mixed sliced fresh wild mushrooms (shiitake, crimini, etc.)

1 large shallot, minced

½ cup dried porcini mushrooms

Sea salt

Coarse ground black pepper

1.5 cups heavy cream

1.5 cups grated Parmesan cheese

1 tsp fresh thyme or tarragon, minced (optional)

2 lbs baby spinach, fresh or frozen 

Panko crumbs

Ingredients

1 large Vidalia or other sweet onion, peeled and thinly sliced

5 tbsp olive oil, divided

6 oz mixed sliced fresh wild mushrooms (shiitake, crimini, etc.)

1 large shallot, minced

½ cup dried porcini mushrooms

Sea salt

Coarse ground black pepper

1.5 cups heavy cream

1.5 cups grated Parmesan cheese

1 tsp fresh thyme or tarragon, minced (optional)

2 lbs baby spinach, fresh or frozen 

Panko crumbs

Directions

1. Preheat oven to 350 degrees

2. Heat large sauté pan with 1 tablespoon of the olive oil. Add onions and cook for five minutes to soften. Add a few grinds of sea salt. Turn heat down to medium low and continue cooking, stirring frequently, until onions are very soft, browned and caramelized (approx. 45 minutes). Set aside.

3. Place dried porcini mushrooms in a bowl and cover with boiling water. Let stand for 30 minutes. Drain, reserving strained liquid from mushrooms.  Chop softened mushrooms.

4. In a large skillet, sauté fresh wild mushrooms with minced shallot over medium high heat in 2 tablespoons of the olive oil until lightly browned. Add reserved strained liquid from dried mushrooms and the chopped porcinis, and cook over medium heat until most of the liquid is absorbed. Stir in reserved caramelized onions. Add the heavy cream and cook mixture over medium high heat until cream thickens (5-10 minutes). Stir in Parmesan cheese and optional herbs. Season with salt and pepper. 

5. In another large skillet, wilt fresh spinach or heat frozen spinach in remaining 2 tablespoons of olive oil over medium heat. Drain well and cool. Squeeze spinach to remove as much liquid as possible. 

6. In 9x9 dish, layer spinach with mushroom-onion cream sauce (spinach first, end with layer of sauce.) Sprinkle top generously with Panko.

7. Bake 15-20 minutes until heated through and bubbling.