Green Bean Casserole from Scratch: Best Recipe - Food55

Ingredients

• 4 large shallots (approx. 200g), thinly sliced into rings
• 2 Tbsp (30g) all-purpose flour
• 1/4 tsp (1g) fine sea salt
• 2 cups (475ml) neutral oil (e.g., canola, vegetable oil) for frying
• 2 lbs (900g) fresh green beans, trimmed
• Coarse salt for blanching water
• 4 Tbsp (60g) unsalted butter
• 1 lb (450g) cremini (brown) mushrooms, thinly sliced
• 1 small yellow onion or 2 small shallots, finely diced
• 2 cloves garlic, minced
• 1/4 cup (30g) all-purpose flour (for the roux)
• 2 cups (475ml) chicken or vegetable stock (low sodium)
• 1 cup (240ml) whole milk or half-and-half
• 1/2 cup (120ml) heavy cream (double cream)
• 1 tsp (5g) dried thyme
• 1/4 tsp (1g) freshly grated nutmeg
• Kosher salt and freshly cracked black pepper to taste