Ingredients:
- 2 lbs fresh green beans, ends trimmed and snapped into 2-inch pieces
- 2 tbsp Kosher salt (for blanching)
- 12 oz fresh Cremini or Baby Bella mushrooms, thinly sliced
- 4 tbsp unsalted butter
- 3 cloves garlic, minced
- 1/4 cup all-purpose flour
- 1 1/2 cups whole milk
- 1/2 cup heavy cream
- 1 tsp soy sauce
- 1/2 tsp nutmeg, freshly grated
- 1/2 tsp salt
- 1/2 tsp black pepper
- 1 1/2 cups crispy fried onions
- 1/2 cup freshly grated Parmesan cheese
Instructions:
- Bring a large pot of water to a rolling boil and add 2 tablespoons of salt. Drop in the fresh green beans and cook for exactly 5 minutes.
- Immediately drain the beans and plunge them into a large bowl of ice water to stop the cooking process and lock in the vibrant green color. Once cold, drain thoroughly and pat dry.
- In a large high-sided skillet, melt the butter over medium-high heat. Add sliced mushrooms and sauté until they reach a deep mahogany-colored caramelization. Add the minced garlic and cook for 1 minute until fragrant.
- Sprinkle the flour over the mushroom mixture and whisk constantly for 1-2 minutes to cook out the raw flour taste.
- Slowly whisk in the whole milk and heavy cream. Add the soy sauce, nutmeg, salt, and pepper. Simmer the sauce until it is thick enough to coat the back of a spoon.
- Combine the blanched green beans and the mushroom sauce in a 9x13 inch baking dish, stirring until the beans are evenly coated.
- Bake at 375°F (190°C) for 20 minutes. Remove from the oven and top with crispy fried onions and Parmesan cheese. Return to the oven for an additional 10-15 minutes until the topping is golden brown and the sauce is bubbling.