Green Bean Casserole | TasteToronto

Ingredients

• 2 pounds green beans
• Salt
• 1 tablespoon olive oil
• 6 tablespoons unsalted butter, divided
• 1 pound white or cremini mushrooms, sliced and divided
• 4 large thyme sprigs
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• 1 cup heavy cream
• 4 garlic cloves, grated and divided
• 1/2 cup grated Parmesan
• Freshly ground black pepper
• 1 cup buttermilk (or 1 cup whole milk + 1 tablespoon vinegar OR lemon juice)
• 1 cup thinly sliced onions or 1 medium sized onion, halves and rings of small onions
• 3/4 cup all-purpose flour
• 1/2 teaspoon salt
• 1/4 teaspoon fresh ground pepper
• Vegetable oil, for frying