NEW YORK (Reuters) – Thomas Keller, one of America's most respected chefs, shares the food memories of his childhood and his time in France in his new book "Bouchon Bakery," which is also the name of his chain of pastry shops in the United States. Keller is the only American chef who owns two three-Michelin-star restaurants – Per Se in New York City and The French Laundry in the Napa Valley wine region in California. Earlier this year, Britain's Restaurant Magazine named Per Se, which opened in 2004, the world's sixth best restaurant. …