By THÉRÈSE MARGOLIS     A group of more than 40 foreign diplomats accredited in Mexico and their spouses toured the country’s renowned Central de Abastos (Ceda), the world’s largest food and flower market, on Tuesday, Feb. 20. The visit, which was coordinated by Ambassador Amanda Mireya Terán Munguía of Mexico’s Foreign Relations Secretariat (SRE) and hosted by Ceda General Administrator Sergio