Greenbean Casserole

Ingredients

• 2 medium onions thinly sliced
• 1/4 cup All-purpose flour
• 2 tablespoons panko bread crumbs
• 1 teaspoon Kosher salt
• Nonstick cooking spray
• 2 tablespoons kosher salt divided + 1 teaspoon
• 1 pound fresh green beans rinsed, trimmed and halved
• 2 tablespoons Unsalted butter
• 12 oz mushrooms trimmed and cut into 1/2-inch pieces
• 1/2 teaspoon Black Pepper freshly ground
• 2 cloves garlic minced
• 1/4 teaspoon nutmeg freshly ground
• 2 tablespoons All-purpose flour
• 1 cup Chicken broth
• 1 cup Half-and-half