"Serves 6..."
INGREDIENTS
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For the Meatballs:
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3 tablespoons butter
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1 onion, finely chopped
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2 small ribs celery, finely chopped
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3 cloves garlic, finely chopped
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Salt and pepper
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2 tablespoons thyme, finely chopped
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1/4 cup dry sherry or white wine
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3 slices 1-inch thick good quality white bread, crusts trimmed
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About 1 cup whole milk
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2 pounds ground sirloin
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1/4 cup chopped flat-leaf parsley
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1/4 cup Worcestershire sauce
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2 tablespoons Dijon mustard
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1 large egg plus 1 yolk, lightly beaten
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Olive oil cooking spray
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For the Horseradish Mash:
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2 1/2 to 3 pounds Russet potatoes, peeled and chunked
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Salt
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1 cup sour cream
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1/4 to 1/2 cup half-n-half or heavy cream
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Coarse black pepper
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3 to 4 tablespoons horseradish, to your taste
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1/4 to 1/3 cup chopped chives
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For the Gravy:
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4 tablespoons butter
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3 tablespoons flour
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3 cups beef stock
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3 tablespoons Worcestershire sauce
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Coarse black pepper
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1 egg yolk, lightly beaten