Washington chefs fell to 1-2 in Iron Chef America competitions, as Bobby Flay defeated the uni-monikered Morou in Battle Frozen Peas last night on the Food Network show — two months after Galileo’s Roberto Donna avenged his own loss to Iron Chef Masaharu Morimoto. Morou — the former Signatures chef who had earned the right to take on an Iron Chef when he topped former 1789 chef Ris Lacoste and Tosca’s Cesare Lanfranconi in the…