Green Bean Casserole From Scratch: Grandma's Secret

Ingredients

• 2 large yellow onions, thinly sliced (approx. 500g)
• 1 cup all-purpose flour (120g), plus more for dredging
• 1 teaspoon salt (6g)
• ½ teaspoon black pepper (3g)
• Vegetable oil, for frying (approx. 4 cups/950ml)
• 2 pounds fresh green beans, trimmed and halved (approx. 900g)
• 1 tablespoon olive oil (15ml)
• Salt and pepper to taste
• 4 tablespoons unsalted butter (60g)
• 8 ounces cremini mushrooms, sliced (approx. 225g)
• ½ teaspoon salt (3g)
• ¼ teaspoon black pepper (1.5g)
• 2 cloves garlic, minced (approx. 6g)
• 3 tablespoons all-purpose flour (25g)
• 3 cups vegetable broth (720ml)
• ½ cup heavy cream (120ml)
• 2 tablespoons soy sauce (30ml)
• 1 teaspoon Worcestershire sauce (5ml)
• ½ teaspoon dried thyme (2.5g)
• Optional: 2 tablespoons dry sherry