A US "taster" tested the food being dished up to President Barack Obama at a dinner in a French restaurant, a waiter said on Sunday. "They have someone who tastes the dishes," said waiter Gabriel de Carvalho from the "La Fontaine de Mars" restaurant where Obama and his family turned up for dinner on Saturday night. "It wasn't very pleasant for the cooks at first, but the person was very nice and was relaxed, so it all went well," he said on the Itele news channel.