Classic Green Bean Casserole
INGREDIENTS
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8 tablespoons unsalted butter, divided
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2 pounds fresh green beans, trimmed and halved
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2 cups sliced fresh baby portobello mushrooms
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1 cup thinly sliced yellow onion
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4 cloves garlic, minced
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1 tablespoon apple cider vinegar
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¼ cup all-purpose flour
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2 cups heavy whipping cream
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½ cup grated Parmesan cheese
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2 tablespoons chopped fresh thyme
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1 tablespoon Worcestershire sauce
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1½ teaspoons kosher salt
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¾ teaspoons ground black pepper
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Fried Onion Topping (recipe follows)
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Garnish: fresh thyme leaves
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