INGREDIENTS
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8 tbsp. unsalted butter
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2 cloves garlic, minced
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1 small yellow onion, minced
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2 tbsp. tomato paste
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1 (24-oz.) can tomato purée
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4 tsp. kosher salt, plus more
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3 tsp. sugar
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freshly ground black pepper
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3⁄4 lb. ground beef
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3⁄4 lb. aneletti pasta
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3⁄4 cup freshly grated parmesan, plus more for serving