Proper Homemade Green Bean Casserole with Fresh Beans

Ingredients

• 2 lbs Fresh Green Beans (ends trimmed, cut into 1-inch lengths)
• 1 Tbsp Kosher Salt (for blanching water)
• 4 Tbsp Unsalted Butter
• 1 small Shallot (or ½ small onion), finely diced
• 8 oz Mixed Mushrooms (e.g., cremini, oyster, shiitake), thinly sliced
• 3 cloves Garlic, minced
• ¼ cup All-Purpose Flour
• 2 cups Low-Sodium Chicken or Vegetable Stock (warmed)
• 1 cup Heavy Cream (Double Cream)
• 1 tsp Worcestershire Sauce (optional, for depth)
• ½ tsp Freshly Ground Black Pepper
• ½ tsp Kosher Salt (plus more to taste)
• 8 oz container Crispy Fried Onions