INGREDIENTS
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2 tablespoons unsalted butter
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12 ounces cremini mushrooms, thickly sliced
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1/2 medium sweet onion, diced
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Kosher salt and freshly ground black pepper, to taste
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1 pound lean ground beef
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2 cloves garlic, minced
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1/2 teaspoon dried thyme
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3 tablespoons all-purpose flour
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1/4 cup dry white wine
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4 cups beef stock
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2 tablespoons Worcestershire sauce
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1 tablespoon Dijon mustard
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8 ounces egg noodles, uncooked
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1/2 cup sour cream
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2 tablespoons chopped fresh parsley leaves