Duck, fat and fries are three words that please most people. Combining them is a very beautiful thing. Chef Amanda Freitag at New York City's The Harrison isn't the only one bathing spuds in quack-quack grease. She cuts hers with a malt vinegar mayo, given the duck fat's richness. After the jump, see what other chefs across the country are skipping peanut or cottonseed oil to embrace rendered duck fat.