INGREDIENTS
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2 Tbsp olive oil, divided
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1 onion, diced
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1 pound ground beef*
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1 pound ground pork*
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1/2 cup bread crumbs
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2 egg yolks
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1/4 tsp ground allspice
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1/4 tsp ground nutmeg
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Kosher salt and freshly ground black pepper, to taste
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1/4 cup unsalted butter
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1/3 cup all-purpose flour
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4 cups beef broth
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3/4 cup sour cream
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Kosher salt and freshly ground black pepper, to taste
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2 Tbsp chopped fresh parsley leaves