# Ingredient List:
→ Vegetables
01 - 2 lb fresh green beans, trimmed and cut into 2-inch pieces (or thawed frozen cut green beans, drained)
→ Sauce Base
02 - 2 tbsp unsalted butter
03 - 9 oz cremini or button mushrooms, sliced
04 - 1 small yellow onion, finely chopped
05 - 2 garlic cloves, minced
06 - 2 tbsp all-purpose flour
07 - 1 cup whole milk
08 - ½ cup heavy cream
09 - ½ cup low-sodium vegetable broth
10 - 1 tsp salt
11 - ½ tsp black pepper
12 - ½ tsp ground nutmeg (optional)
→ Topping
13 - 1½ cups crispy fried onions (store-bought or homemade)
# Directions:
01 - Set oven temperature to 350°F.
02 - Boil salted water in a large pot. Add green beans and cook for 5 minutes until tender but bright. Drain and rinse under cold water to halt cooking.
03 - Melt butter in a large skillet over medium heat. Add mushrooms and cook 5-6 minutes until browned. Stir in onion and garlic; cook 2-3 minutes until softened.
04 - Add flour to skillet, cook 1 minute while stirring. Gradually whisk in milk, cream, and broth. Simmer until thickened, about 5 minutes. Season with salt, pepper, and nutmeg if used.
05 - Add drained green beans to skillet and toss to coat evenly.
06 - Transfer mixture to a 2-quart baking dish. Sprinkle half of the fried onions on top.
07 - Bake for 25 minutes until mixture is bubbly.
08 - Remove dish from oven, top with remaining fried onions, and bake 5-7 minutes until onions are golden and crisp.
09 - Allow to cool for 5 minutes before serving.
